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1.
  • Wierenga, Lara M., et al. (författare)
  • Greater male than female variability in regional brain structure across the lifespan
  • 2022
  • Ingår i: Human Brain Mapping. - : John Wiley & Sons. - 1065-9471 .- 1097-0193. ; 43:1, s. 470-499
  • Tidskriftsartikel (refereegranskat)abstract
    • For many traits, males show greater variability than females, with possible implications for understanding sex differences in health and disease. Here, the ENIGMA (Enhancing Neuro Imaging Genetics through Meta-Analysis) Consortium presents the largest-ever mega-analysis of sex differences in variability of brain structure, based on international data spanning nine decades of life. Subcortical volumes, cortical surface area and cortical thickness were assessed in MRI data of 16,683 healthy individuals 1-90 years old (47% females). We observed significant patterns of greater male than female between-subject variance for all subcortical volumetric measures, all cortical surface area measures, and 60% of cortical thickness measures. This pattern was stable across the lifespan for 50% of the subcortical structures, 70% of the regional area measures, and nearly all regions for thickness. Our findings that these sex differences are present in childhood implicate early life genetic or gene-environment interaction mechanisms. The findings highlight the importance of individual differences within the sexes, that may underpin sex-specific vulnerability to disorders.
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2.
  • Knudsen, Line V, et al. (författare)
  • Conducting qualitative research in audiology : A tutorial
  • 2012
  • Ingår i: International Journal of Audiology. - : Informa Healthcare. - 1499-2027 .- 1708-8186. ; 51:2, s. 83-92
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE:Qualitative research methodologies are being used more frequently in audiology as it allows for a better understanding of the perspectives of people with hearing impairment. This article describes why and how international interdisciplinary qualitative research can be conducted.DESIGN:This paper is based on a literature review and our recent experience with the conduction of an international interdisciplinary qualitative study in audiology.RESULTS:We describe some available qualitative methods for sampling, data collection, and analysis and we discuss the rationale for choosing particular methods. The focus is on four approaches which have all previously been applied to audiologic research: grounded theory, interpretative phenomenological analysis, conversational analysis, and qualitative content analysis.CONCLUSIONS:This article provides a review of methodological issues useful for those designing qualitative research projects in audiology or needing assistance in the interpretation of qualitative literature.
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3.
  • Kramer, Sophia E., et al. (författare)
  • Cortisol, Chromogranin A, and Pupillary Responses Evoked by Speech Recognition Tasks in Normally Hearing and Hard-of-Hearing Listeners: A Pilot Study
  • 2016
  • Ingår i: Ear and Hearing. - : LIPPINCOTT WILLIAMS & WILKINS. - 0196-0202 .- 1538-4667. ; 37, s. 126S-135S
  • Tidskriftsartikel (refereegranskat)abstract
    • Pupillometry is one method that has been used to measure processing load expended during speech understanding. Notably, speech perception (in noise) tasks can evoke a pupil response. It is not known if there is concurrent activation of the sympathetic nervous system as indexed by salivary cortisol and chromogranin A (CgA) and whether such activation differs between normally hearing (NH) and hard-of-hearing (HH) adults. Ten NH and 10 adults with mild-to-moderate hearing loss (mean age 52 years) participated. Two speech perception tests were administered in random order: one in quiet targeting 100% correct performance and one in noise targeting 50% correct performance. Pupil responses and salivary samples for cortisol and CgA analyses were collected four times: before testing, after the two speech perception tests, and at the end of the session. Participants rated their perceived accuracy, effort, and motivation. Effects were examined using repeated-measures analyses of variance. Correlations between outcomes were calculated. HH listeners had smaller peak pupil dilations (PPDs) than NH listeners in the speech in noise condition only. No group or condition effects were observed for the cortisol data, but HH listeners tended to have higher cortisol levels across conditions. CgA levels were larger at the pretesting time than at the three other test times. Hearing impairment did not affect CgA. Self-rated motivation correlated most often with cortisol or PPD values. The three physiological indicators of cognitive load and stress (PPD, cortisol, and CgA) are not equally affected by speech testing or hearing impairment. Each of them seem to capture a different dimension of sympathetic nervous system activity.
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4.
  • Laplante-Levesque, Ariane, et al. (författare)
  • Hearing help-seeking and rehabilitation : Perspectives of adults with hearing impairment
  • 2012
  • Ingår i: International Journal of Audiology. - : Informa Healthcare. - 1499-2027 .- 1708-8186. ; 51:2, s. 93-102
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE:This study investigated the perspectives of adults with hearing impairment on hearing help-seeking and rehabilitation.DESIGN:Individual semi-structured interviews were completed.STUDY SAMPLE:In total, 34 adults with hearing impairment in four countries (Australia, Denmark, UK, and USA) participated. Participants had a range of experience with hearing help-seeking and rehabilitation, from never having sought help to being satisfied hearing-aid users.RESULTS:Qualitative content analysis identified four main categories ('perceiving my hearing impairment', 'seeking hearing help', 'using my hearing aids', and 'perspectives and knowledge') and, at the next level, 25 categories. This article reports on the densest categories: they are described, exemplified with interview quotes, and discussed.CONCLUSIONS:People largely described hearing help-seeking and rehabilitation in the context of their daily lives. Adults with hearing impairment rarely described clinical encounters towards hearing help-seeking and rehabilitation as a connected process. They portrayed interactions with clinicians as isolated events rather than chronologically-ordered steps relating to a common goal. Clinical implications of the findings are discussed.
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5.
  • Pichora-Fuller, Kathleen M., et al. (författare)
  • Hearing Impairment and Cognitive Energy: The Framework for Understanding Effortful Listening (FUEL)
  • 2016
  • Ingår i: Ear and Hearing. - : LIPPINCOTT WILLIAMS & WILKINS. - 0196-0202 .- 1538-4667. ; 37, s. 5S-27S
  • Tidskriftsartikel (refereegranskat)abstract
    • The Fifth Eriksholm Workshop on "Hearing Impairment and Cognitive Energy" was convened to develop a consensus among interdisciplinary experts about what is known on the topic, gaps in knowledge, the use of terminology, priorities for future research, and implications for practice. The general term cognitive energy was chosen to facilitate the broadest possible discussion of the topic. It goes back to Titchener (1908) who described the effects of attention on perception; he used the term psychic energy for the notion that limited mental resources can be flexibly allocated among perceptual and mental activities. The workshop focused on three main areas: (1) theories, models, concepts, definitions, and frameworks; (2) methods and measures; and (3) knowledge translation. We defined effort as the deliberate allocation of mental resources to overcome obstacles in goal pursuit when carrying out a task, with listening effort applying more specifically when tasks involve listening. We adapted Kahnemans seminal (1973) Capacity Model of Attention to listening and proposed a heuristically useful Framework for Understanding Effortful Listening (FUEL). Our FUEL incorporates the well-known relationship between cognitive demand and the supply of cognitive capacity that is the foundation of cognitive theories of attention. Our FUEL also incorporates a motivation dimension based on complementary theories of motivational intensity, adaptive gain control, and optimal performance, fatigue, and pleasure. Using a three-dimensional illustration, we highlight how listening effort depends not only on hearing difficulties and task demands but also on the listeners motivation to expend mental effort in the challenging situations of everyday life.
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6.
  • Alfandari, Defne, et al. (författare)
  • Brain Volume Differences Associated With Hearing Impairment in Adults
  • 2018
  • Ingår i: TRENDS IN HEARING. - : SAGE PUBLICATIONS INC. - 2331-2165. ; 22
  • Tidskriftsartikel (refereegranskat)abstract
    • Speech comprehension depends on the successful operation of a network of brain regions. Processing of degraded speech is associated with different patterns of brain activity in comparison with that of high-quality speech. In this exploratory study, we studied whether processing degraded auditory input in daily life because of hearing impairment is associated with differences in brain volume. We compared TI-weighted structural magnetic resonance images of 17 hearing-impaired (HI) adults with those of 17 normal-hearing (NH) controls using a voxel-based morphometry analysis. HI adults were individually matched with NH adults based on age and educational level. Gray and white matter brain volumes were compared between the groups by region-of-interest analyses in structures associated with speech processing, and by whole-brain analyses. The results suggest increased gray matter volume in the right angular gyrus and decreased white matter volume in the left fusiform gyrus in HI listeners as compared with NH ones. In the HI group, there was a significant correlation between hearing acuity and cluster volume of the gray matter cluster in the right angular gyrus. This correlation supports the link between partial hearing loss and altered brain volume. The alterations in volume may reflect the operation of compensatory mechanisms that are related to decoding meaning from degraded auditory input.
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7.
  • Besser, Jana, et al. (författare)
  • How Linguistic Closure and Verbal Working Memory Relate to Speech Recognition in Noise-A Review
  • 2013
  • Ingår i: Trends in Amplification. - : Sage Publications. - 1084-7138. ; 17:2, s. 75-93
  • Tidskriftsartikel (refereegranskat)abstract
    • The ability to recognize masked speech, commonly measured with a speech reception threshold (SRT) test, is associated with cognitive processing abilities. Two cognitive factors frequently assessed in speech recognition research are the capacity of working memory (WM), measured by means of a reading span (Rspan) or listening span (Lspan) test, and the ability to read masked text (linguistic closure), measured by the text reception threshold (TRT). The current article provides a review of recent hearing research that examined the relationship of TRT and WM span to SRTs in various maskers. Furthermore, modality differences in WM capacity assessed with the Rspan compared to the Lspan test were examined and related to speech recognition abilities in an experimental study with young adults with normal hearing (NH). Span scores were strongly associated with each other, but were higher in the auditory modality. The results of the reviewed studies suggest that TRT and WM span are related to each other, but differ in their relationships with SRT performance. In NH adults of middle age or older, both TRT and Rspan were associated with SRTs in speech maskers, whereas TRT better predicted speech recognition in fluctuating nonspeech maskers. The associations with SRTs in steady-state noise were inconclusive for both measures. WM span was positively related to benefit from contextual information in speech recognition, but better TRTs related to less interference from unrelated cues. Data for individuals with impaired hearing are limited, but larger WM span seems to give a general advantage in various listening situations.
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8.
  • Besser, Jana, et al. (författare)
  • New measures of masked text recognition in relation to speech-in-noise perception and their associations with age and cognitive abilities
  • 2012
  • Ingår i: Journal of Speech, Language and Hearing Research. - : American Speech Language Hearing Association. - 1092-4388 .- 1558-9102. ; 55:1, s. 194-209
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: This research aimed to increase the analogy between text reception threshold (TRT) and speech reception threshold (SRT) and to examine the TRT's value in estimating cognitive abilities important for speech comprehension in noise. Method: We administered five TRT versions, SRT tests in stationary (SRTSTAT) and modulated (SRTMOD) noise, and two cognitive tests: a reading span (RSpan) test for working memory capacity, and a letter-digit-substitution test for information processing speed. Fifty-five normal hearing adults (18–78 years, mean = 44) participated. We examined mutual associations of the tests and their predictive value for the SRTs with correlation and linear regression analyses. Results: SRTs and TRTs were well associated, also when controlling for age. Correlations for the SRTSTAT were generally lower than for the SRTMOD. The cognitive tests were only correlated to the SRTs when age was not controlled for. Age and the TRTs were the only significant predictors of SRTMOD. SRTSTATwas predicted by level of education and some of the TRT versions. Conclusions: TRTs and SRTs are robustly associated, nearly independent of age. The association between SRTs and RSpan is largely age-dependent. The TRT test and the RSpan test measure different non-auditory components of linguistic processing relevant for speech perception in noise.
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10.
  • Besser, Jana, et al. (författare)
  • Speech-in-Speech Listening on the LiSN-S Test by Older Adults With Good Audiograms Depends on Cognition and Hearing Acuity at High Frequencies
  • 2015
  • Ingår i: Ear and Hearing. - : LIPPINCOTT WILLIAMS and WILKINS. - 0196-0202 .- 1538-4667. ; 36:1, s. 24-41
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: The main objective was to investigate age-related differences on the listening in spatialized noise-sentences (LiSN-S) test in adults with normal audiometric thresholds in most of the speech range. A second objective was to examine the contributions of auditory, cognitive, and linguistic abilities to LiSN-S outcomes. Design: The LiSN-S test was administered to participants in an older group (M-Age = 72.0, SD = 4.3 years) and a younger group (M-Age = 21.7, SD = 2.6 years) with N = 26 per group. All the participants had clinically normal audiometric thresholds at frequencies up to and including 3000 Hz. The LiSN-S test yields a speech reception threshold (SRT) in each of the four speech-in-speech listening conditions that differ in the availability of voice difference cues and/or spatial separation cues. Based on these four SRTs, the scores were calculated for the talker advantage, the spatial advantage, and the total advantage as a result of both the types of cues. Additionally, the participants completed four auditory temporal-processing tests, a cognitive screening test, a vocabulary test, and tests of linguistic closure for high-and low-context sentences. The contributions of these predictor variables and measures of pure-tone hearing acuity to LiSN-S outcomes were analyzed for both the groups using regression analyses. Results: Younger listeners outperformed the older listeners on all four LiSN-S SRTs and all the three LiSN-S advantage measures. Age-related differences were larger for conditions involving the use of spatial cues. For the younger group, all LiSN-S SRTs were predicted by the measure of linguistic closure in low-context sentences; in addition, the SRT for the condition with voice difference cues but without spatial separation cues was predicted by vocabulary, and the SRT for the condition with both voice difference cues and spatial separation cues was predicted by temporal resolution at low frequencies. Vocabulary also contributed to the talker advantage in the younger group, whereas the spatial advantage was predicted by high-frequency pure-tone hearing acuity in the range 6,000 to 10,000 Hz (pure-tone average [ PTA] HIGH). For the older group, the LiSN-S SRT in the condition with neither voice difference cues nor spatial separation cues was predicted by age; their other three LiSN-S SRTs and all advantage measures were predicted by PTA HIGH. In addition, for the older group, cognition predicted LiSN-S SRT outcomes in three of the four conditions. Measures of auditory temporal processing, linguistic abilities, or hearing acuity up to and including 4000 Hz did not predict LiSN-S outcomes in this group. Conclusions: LiSN-S outcomes were poorer for adults aged 65 years or older, even those with good audiograms, compared with younger adults and also compared with people up to the age of 60 years from a previous study. In the present study, regardless of the types of cues, auditory and cognitive interactions were reflected by the combined influences on LiSN-S outcomes of high-frequency hearing acuity and measures of linguistic and cognitive processing. The data also suggest a hierarchy in the deployment of processing resources, which would account for the observed shift from linguistic abilities in the younger group to general cognitive abilities in the older group.
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14.
  • C. Manchaiah, Vinaya K., 1983-, et al. (författare)
  • The role of communication partners in the audiological enablement/rehabilitation of a person with hearing impairment : An overview
  • 2012
  • Ingår i: Audiological Medicine. - 1651-386X .- 1651-3835. ; 10:1, s. 21-30
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: Hearing impairment is known to have various effects upon both the person with hearing impairment (PHI) and their communication partners (CPs). In addition, CPs are reported to play an important role in making the decision to seek a consultation and the acceptance of intervention by the PHI. The overall aim of this paper is to provide a comprehensive overview of the role of the CP in the audiological enablement/rehabilitation of the PHI keeping clinical practice in focus. Method: A literature review was conducted using a number of resources including electronic databases, books and websites. Results: An overview of the literature was presented in the following sections: 1) Factors influencing the audiological enablement/rehabilitation of the PHI; 2) Effect of the PHI's hearing impairment on their CPs; 3) CPs’ influence on their PHI's audiological enablement/rehabilitation; 4) Positive experiences reported by CPs of the PHI; 5) Models to represent CPs within the social network context of the PHI; and 6) CP involvement in the audiological enablement/rehabilitation. This paper also identifies gaps in the literature and provides recommendations for further research. Conclusion: It is clear that involvement of the CP in the audiological enablement/rehabilitation can result in mutual advantages for both the PHI and their CPs.
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15.
  • Danermark, Berth, 1951-, et al. (författare)
  • The Creation of a Comprehensive and a Brief Core Set for Hearing Loss Using the International Classification of Functioning, Disability and Health
  • 2013
  • Ingår i: American Journal of Audiology. - : American Speech Language Hearing Association. - 1059-0889 .- 1558-9137. ; 22:2, s. 323-328
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: In May 2001, to integrate biological, psychological, and social aspects of human functioning, the World Health Assembly endorsed the International Classification of Functioning, Disability and Health (ICF). The aim of this article is to describe the creation of Comprehensive and Brief ICF Core Sets for Hearing Loss. The core sets consist of the most relevant ICF categories for hearing loss. Method and Results: Four preparatory studies were carried out and presented at a consensus conference, resulting in a Comprehensive ICF Core Set for Hearing Loss, consisting of 117 ICF categories, and a Brief ICF Core Set for Hearing Loss, consisting of 27 categories (of the 117). Conclusion: The Comprehensive ICF Core Set for Hearing Loss can be a user-friendly tool for conducting comprehensive, multidisciplinary assessments. The Brief ICF Core Set can be used for many purposes, such as research and population studies. However, its most common use is by individuals seeking to provide a brief description and assessment of functioning of a person with hearing loss.
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16.
  • Granberg, Sarah, 1973-, et al. (författare)
  • The ICF core sets for hearing loss project : Functioning and disability from the patient perspective
  • 2014
  • Ingår i: International Journal of Audiology. - London, UK : Informa Healthcare. - 1499-2027 .- 1708-8186. ; 53:11, s. 777-786
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To explore areas of functioning, disability, and environmental factors of adults with hearing loss (HL) by using the ICF classification as a tool to determine and document each element. Design: A qualitative study applying mainly focus-group methodology was applied.Study sample: Thirty-six Dutch and South African adults (18 years of age) with HL (20–95 dB HL) who used oral communication as first communication. Summative content analysis was performed on the transcripts by linkage to appropriate ICF categories.Results: 143 ICF categories were identified, most of which belonged to the Activities & Participation (d) component, closely followed by the Environmental factors component. Participants specifically mentioned categories related to oral communication and interaction. Assistive technology (such as hearing aids), noise, and support by and attitudes of others in the environment of the participants were considered highly influential for functioning and disability.Conclusions: The present study illustrates the complex and encompassing nature of aspects involved in functioning and disability of adults with HL. Findings highlight the necessity of using a multidimensional tool, such as the ICF, to map functioning and disability with hearing loss, allowing consideration and evaluation of aspects that are both internal and external.
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17.
  • Hallberg, Lillemor R.-M., et al. (författare)
  • Self-reported hearing difficulties, communication strategies and psychological general well-being (quality of life) in patients with acquired hearing impairment
  • 2008
  • Ingår i: Disability and Rehabilitation. - London : Informa Healthcare. - 0963-8288 .- 1464-5165. ; 30:3, s. 203-212
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE. The aims were to (i) translate the Amsterdam Inventory for Auditory Disability and Handicap (AIADH) into Swedish and evalute its usefulness, (ii) describe hearing difficulties and psychological well-being (quality of life) and (iii) explore variables related to psychological well-being in a Swedish population. METHOD. Seventy-nine consecutive patients, referred to the hearing clinic for hearing examination and audiological rehabilitation, formed the study sample. Along with pure-tone audiometry, the AIADH, the Psychological General Well-being index and the Communication Strategies Scale were used. RESULTS. Men had significantly worse hearing on the high frequencies (2, 3, 4 and 6 kHz) than women but their quality of life was significantly higher than for women. Men scored significantly lower on 'auditory localization' and adopted non-verbal communication strategies less often than women. A stepwise regression analysis showed that 'maladaptive behaviours' and 'intelligibility in quiet' explained 48% of the variance in quality of life. CONCLUSION. Psychosocial consequences of hearing loss, such as lowered quality of life, cannot be predicted from audiometric data alone. The adverse relationship between maladaptive behaviour and quality of life emphasizes the relevance of developing training programs aiming to improve coping with the consequences of a hearing impairment.The AIADH may be useful in assessing self-reported difficulties among patients with hearing problems, but needs to be further developed in terms of psychometric evaluations and reliability testings based on a larger representative sample.
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18.
  • Hoshino, Ayuko, et al. (författare)
  • Tumour exosome integrins determine organotropic metastasis
  • 2015
  • Ingår i: Nature. - : NATURE PUBLISHING GROUP. - 0028-0836 .- 1476-4687. ; 527:7578, s. 329-
  • Tidskriftsartikel (refereegranskat)abstract
    • Ever since Stephen Pagets 1889 hypothesis, metastatic organotropism has remained one of cancers greatest mysteries. Here we demonstrate that exosomes from mouse and human lung-, liver-and brain-tropic tumour cells fuse preferentially with resident cells at their predicted destination, namely lung fibroblasts and epithelial cells, liver Kupffer cells and brain endothelial cells. We show that tumour-derived exosomes uptaken by organ-specific cells prepare the pre-metastatic niche. Treatment with exosomes from lung-tropic models redirected the metastasis of bone-tropic tumour cells. Exosome proteomics revealed distinct integrin expression patterns, in which the exosomal integrins alpha(6)beta(4) and alpha(6)beta(1) were associated with lung metastasis, while exosomal integrin alpha(v)beta(5) was linked to liver metastasis. Targeting the integrins alpha(6)beta(4) and alpha(v)beta(5) decreased exosome uptake, as well as lung and liver metastasis, respectively. We demonstrate that exosome integrin uptake by resident cells activates Src phosphorylation and pro-inflammatory S100 gene expression. Finally, our clinical data indicate that exosomal integrins could be used to predict organ-specific metastasis.
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19.
  • Knudsen, Line V., et al. (författare)
  • Client labor : adults with hearing impairment describing their participation in their hearing help-seeking and rehabilitation
  • 2013
  • Ingår i: Journal of the American Academy of Audiology. - : American Academy of Audiology. - 1050-0545 .- 2157-3107. ; 24:3, s. 192-204
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND:The uptake and use of hearing aids is low compared to the prevalence of hearing impairment. People who seek help and take part in a hearing aid rehabilitation process participate actively in this process in several ways.PURPOSE:In order to gain more knowledge on the challenges of hearing help-seeking and hearing aid use, this qualitative study sought to understand the ways that people with hearing impairment describe themselves as active participants throughout the hearing aid rehabilitation process.RESEARCH DESIGN:In this qualitative interview study we examined the hearing rehabilitation process from the perspective of the hearing impaired. In this article we describe how the qualitative interview material was interpreted by a pragmatic qualitative thematic analysis. The analysis described in this article focused on the efforts, initiatives, actions, and participation the study participants described that they had engaged in during their rehabilitation.STUDY SAMPLE:Interviews were conducted with people with hearing impairment in Australia, Denmark, the United Kingdom, and the United States. The 34 interview participants were distributed equally between the sites, just as men and women were almost equally represented (56% women). The average age of the participants was 64. All participants had a hearing impairment in at least one ear. The participants were recruited to represent a range of experiences with hearing help-seeking and rehabilitation.DATA COLLECTION AND ANALYSIS:With each participant one qualitative semistructured interview ranging between 1 and 2 hr was carried out. The interviews were transcribed verbatim, read through several times, and themes were identified, defined, and reviewed by an iterative process.RESULTS:From this thematic focus a concept called "client labor" has emerged. Client labor contains nine subthemes divided into three overarching groups: cognitive labor, emotional labor, and physical labor. The participants' experiences and meaning-making related to these conceptual types of efforts is described.CONCLUSIONS:The study findings have implications for the clinical encounter between people with hearing impairment and hearing health-care professionals. We suggest that a patient-centered approach that bears in mind the client's active participation could help toward improving clinical dispensing, fitting, and counseling practices with the end goal to increase hearing aid benefit and satisfaction
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20.
  • Koelewijn, Thomas, et al. (författare)
  • Processing Load Induced by Informational Masking Is Related to Linguistic Abilities
  • 2012
  • Ingår i: International Journal of Otolaryngology. - : Hindawi Publishing Corporation. - 1687-9201 .- 1687-921X.
  • Tidskriftsartikel (refereegranskat)abstract
    • It is often assumed that the benefit of hearing aids is not primarily reflected in better speech performance, but that it is reflected in less effortful listening in the aided than in the unaided condition. Before being able to assess such a hearing aid benefit the present study examined how processing load while listening to masked speech relates to inter-individual differences in cognitive abilities relevant for language processing. Pupil dilation was measured in thirty-two normal hearing participants while listening to sentences masked by fluctuating noise or interfering speech at either 50% and 84% intelligibility. Additionally, working memory capacity, inhibition of irrelevant information, and written text reception was tested. Pupil responses were larger during interfering speech as compared to fluctuating noise. This effect was independent of intelligibility level. Regression analysis revealed that high working memory capacity, better inhibition, and better text reception were related to better speech reception thresholds. Apart from a positive relation to speech recognition, better inhibition and better text reception are also positively related to larger pupil dilation in the single-talker masker conditions. We conclude that better cognitive abilities not only relate to better speech perception, but also partly explain higher processing load in complex listening conditions.
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21.
  • Koelewijn, Thomas, et al. (författare)
  • Pupil Dilation Uncovers Extra Listening Effort in the Presence of a Single-Talker Masker
  • 2012
  • Ingår i: Ear and Hearing. - : Lippincott, Williams and Wilkins. - 0196-0202 .- 1538-4667. ; 33:2, s. 291-300
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: Recent research has demonstrated that pupil dilation, a measure of mental effort (cognitive processing load), is sensitive to differences in speech intelligibility. The present study extends this outcome by examining the effects of masker type and age on the speech reception threshold (SRT) and mental effort. less thanbrgreater than less thanbrgreater thanDesign: In young and middle-aged adults, pupil dilation was measured while they performed an SRT task, in which spoken sentences were presented in stationary noise, fluctuating noise, or together with a single-talker masker. The masker levels were adjusted to achieve 50% or 84% sentence intelligibility. less thanbrgreater than less thanbrgreater thanResults: The results show better SRTs for fluctuating noise and a single-talker masker compared with stationary noise, which replicates results of previous studies. The peak pupil dilation, reflecting mental effort, was larger in the single-interfering speaker condition compared with the other masker conditions. Remarkably, in contrast to the thresholds, no differences in peak dilation were observed between fluctuating noise and stationary noise. This effect was independent of the intelligibility level and age. less thanbrgreater than less thanbrgreater thanConclusions: To maintain similar intelligibility levels, participants needed more mental effort for speech perception in the presence of a single-talker masker and then with the two other types of maskers. This suggests an additive interfering effect of speech information from the single-talker masker. The dissociation between these performance and mental effort measures underlines the importance of including measurements of pupil dilation as an independent index of mental effort during speech processing in different types of noisy environments and at different intelligibility levels.
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22.
  • Koelewijn, Thomas, et al. (författare)
  • The effect of monetary reward on listening effort and sentence recognition
  • 2021
  • Ingår i: Hearing Research. - : Elsevier. - 0378-5955 .- 1878-5891. ; 406
  • Tidskriftsartikel (refereegranskat)abstract
    • Recently we showed that higher reward results in increased pupil dilation during listening (listening effort). Remarkably, this effect was not accompanied with improved speech reception. Still, increased listening effort may reflect more in-depth processing, potentially resulting in a better memory representation of speech. Here, we investigated this hypothesis by also testing the effect of monetary reward on recognition memory performance. Twenty-four young adults performed speech reception threshold (SRT) tests, either hard or easy, in which they repeated sentences uttered by a female talker masked by a male talker. We recorded the pupil dilation response during listening. Participants could earn a high or low reward and the four conditions were presented in a blocked fashion. After each SRT block, participants performed a visual sentence recognition task. In this task, the sentences that were presented in the preceding SRT task were visually presented in random order and intermixed with unfamiliar sentences. Participants had to indicate whether they had previously heard the sentence or not. The SRT and sentence recognition were affected by task difficulty but not by reward. Contrary to our previous results, peak pupil dilation did not reflect effects of reward. However, post-hoc time course analysis (GAMMs) revealed that in the hard SRT task, the pupil response was larger for high than low reward. We did not observe an effect of reward on visual sentence recognition. Hence, the current results provide no conclusive evidence that the effect of monetary reward on the pupil response relates to the memory encoding of speech. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )
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23.
  • Koelewijn, Thomas, et al. (författare)
  • The effect of reward on listening effort as reflected by the pupil dilation response
  • 2018
  • Ingår i: Hearing Research. - : ELSEVIER SCIENCE BV. - 0378-5955 .- 1878-5891. ; 367, s. 106-112
  • Tidskriftsartikel (refereegranskat)abstract
    • Listening to speech in noise can be effortful but when motivated people seem to be more persevering. Previous research showed effects of monetary reward on autonomic responses like cardiovascular reactivity and pupil dilation while participants processed auditory information. The current study examined the effects of monetary reward on the processing of speech in noise and related listening effort as reflected by the pupil dilation response. Twenty-four participants (median age 21 yrs) performed two speech reception threshold (SRT) tasks, one tracking 50% correct (hard) and one tracking 85% correct (easy), both of which they listened to and repeated sentences uttered by a female talker. The sentences were presented with a single male talker or, in a control condition, in quiet. Participants were told that they could earn a high (5 euros) or low (0.20 euro) reward when repeating 70% or more of the sentences correctly. Conditions were presented in a blocked fashion and during each trial, pupil diameter was recorded. At the end of each block, participants rated the effort they had experienced, their performance, and their tendency to quit listening. Additionally, participants performed a working memory capacity task and filled in a need-for-recovery questionnaire as these tap into factors that influence the pupil dilation response. The results showed no effect of reward on speech perception performance as reflected by the SRT. The peak pupil dilation showed a significantly larger response for high than for low reward, for the easy and hard conditions, but not the control condition. Higher need for recovery was associated with a higher subjective tendency to quit listening. Consistent with the Framework for Understanding Effortful Listening, we conclude that listening effort as reflected by the peak pupil dilation is sensitive to the amount of monetary reward. (C) 2018 The Authors. Published by Elsevier B.V.
  •  
24.
  • Koelewijn, Thomas, et al. (författare)
  • The influence of informational masking on speech perception and pupil response in adults with hearing impairment
  • 2014
  • Ingår i: Journal of the Acoustical Society of America. - : American Institute of Physics (AIP). - 0001-4966 .- 1520-8524. ; 135:3, s. 1596-1606
  • Tidskriftsartikel (refereegranskat)abstract
    • A recent pupillometry study on adults with normal hearing indicates that the pupil response during speech perception (cognitive processing load) is strongly affected by the type of speech masker. The current study extends these results by recording the pupil response in 32 participants with hearing impairment (mean age 59 yr) while they were listening to sentences masked by fluctuating noise or a single-talker. Efforts were made to improve audibility of all sounds by means of spectral shaping. Additionally, participants performed tests measuring verbal working memory capacity, inhibition of interfering information in working memory, and linguistic closure. The results showed worse speech reception thresholds for speech masked by single-talker speech compared to fluctuating noise. In line with previous results for participants with normal hearing, the pupil response was larger when listening to speech masked by a single-talker compared to fluctuating noise. Regression analysis revealed that larger working memory capacity and better inhibition of interfering information related to better speech reception thresholds, but these variables did not account for inter-individual differences in the pupil response. In conclusion, people with hearing impairment show more cognitive load during speech processing when there is interfering speech compared to fluctuating noise. (C) 2014 Acoustical Society of America.
  •  
25.
  • Koelewijn, Thomas, et al. (författare)
  • The pupil response is sensitive to divided attention during speech processing
  • 2014
  • Ingår i: Hearing Research. - : Elsevier. - 0378-5955 .- 1878-5891. ; 312, s. 114-120
  • Tidskriftsartikel (refereegranskat)abstract
    • Dividing attention over two streams of speech strongly decreases performance compared to focusing on only one. How divided attention affects cognitive processing load as indexed with pupillometry during speech recognition has so far not been investigated. In 12 young adults the pupil response was recorded while they focused on either one or both of two sentences that were presented dichotically and masked by fluctuating noise across a range of signal-to-noise ratios. In line with previous studies, the performance decreases when processing two target sentences instead of one. Additionally, dividing attention to process two sentences caused larger pupil dilation and later peak pupil latency than processing only one. This suggests an effect of attention on cognitive processing load (pupil dilation) during speech processing in noise.
  •  
26.
  • Koelewijn, Thomas, et al. (författare)
  • The pupil response reveals increased listening effort when it is difficult to focus attention
  • 2015
  • Ingår i: Hearing Research. - : Elsevier. - 0378-5955 .- 1878-5891. ; 323, s. 81-90
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent studies have shown that prior knowledge about where, when, and who is going to talk improves speech intelligibility. How related attentional processes affect cognitive processing load has not been investigated yet. In the current study, three experiments investigated how the pupil dilation response is affected by prior knowledge of target speech location, target speech onset, and who is going to talk. A total of 56 young adults with normal hearing participated. They had to reproduce a target sentence presented to one ear while ignoring a distracting sentence simultaneously presented to the other ear. The two sentences were independently masked by fluctuating noise. Target location (left or right ear), speech onset, and talker variability were manipulated in separate experiments by keeping these features either fixed during an entire block or randomized over trials. Pupil responses were recorded during listening and performance was scored after recall. The results showed an improvement in performance when the location of the target speech was fixed instead of randomized. Additionally, location uncertainty increased the pupil dilation response, which suggests that prior knowledge of location reduces cognitive load. Interestingly, the observed pupil responses for each condition were consistent with subjective reports of listening effort. We conclude that communicating in a dynamic environment like a cocktail party (where participants in competing conversations move unpredictably) requires substantial listening effort because of the demands placed on attentional processes. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
  •  
27.
  •  
28.
  • Ohlenforst, Barbara, et al. (författare)
  • Effects of hearing aid rehabilitation on listening effort a systematic literature review
  • 2015
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Hearing impairment negatively affects speech perception and may increase listening effort, especially under adverse conditions such as in the presence of background noise. Previous research showed that hearing-aid rehabilitation can improve speech perception performance. However, it is not clear whether it influences listening effort during speech perception. The aim of this systematic review is to provide an overview of available evidence of the effect of hearing-aid rehabilitation on listening effort. English language articles were identified through systematic searches in PubMed, EMBASE, Cinahl, the Cochrane Library, PsycINFO and through reference checking from inception to August 2014. The primary search produced 12210 unique hits using the key-words: hearing aids OR hearing impairment AND listening effort OR perceptual effort OR ease of listening. Three researchers independently determined eligibility of the articles. In total, about 45 articles fulfilled the search and selection criteria of: experimental work on hearing aid technologies AND listening effort OR fatigue during speech perception.Most of the about 45 eligible studies (about 70%) measured perceived effort using subjective scales or questionnaires. Behavioral measures of listening effort mainly included dual-task paradigms. Finally, physiological measures such as provided by pupillometry, electroencephalography and functional magnetic resonance imaging objectively estimated listening effort. Some studies found that hearing-aid rehabilitation was associated with significant reductions of listening effort, while others failed to do so or even reported an increase of listening effort associated with hearing-aid rehabilitation.This review summarizes the available evidence on the effects of hearing aid rehabilitation on listening effort.
  •  
29.
  • Ohlenforst, Barbara, et al. (författare)
  • Effects of Hearing Impairment and Hearing Aid Amplification on Listening Effort : A Systematic Review
  • 2017
  • Ingår i: Ear and Hearing. - : Lippincott Williams & Wilkins. - 0196-0202 .- 1538-4667. ; 38:3, s. 267-281
  • Forskningsöversikt (refereegranskat)abstract
    • Objectives: To undertake a systematic review of available evidence on the effect of hearing impairment and hearing aid amplification on listening effort. Two research questions were addressed: Q1) does hearing impairment affect listening effort? and Q2) can hearing aid amplification affect listening effort during speech comprehension? Design: English language articles were identified through systematic searches in PubMed, EMBASE, Cinahl, the Cochrane Library, and PsyclNFO from inception to August 2014. References of eligible studies were checked. The Population, Intervention, Control, Outcomes, and Study design strategy was used to create inclusion criteria for relevance. It was not feasible to apply a meta-analysis of the results from comparable studies. For the articles identified as relevant, a quality rating, based on the 2011 Grading of Recommendations Assessment, Development, and Evaluation Working Group guidelines, was carried out to judge the reliability and confidence of the estimated effects. Results: The primary search produced 7017 unique hits using the keywords: hearing aids OR hearing impairment AND listening effort OR perceptual effort OR ease of listening. Of these, 41 articles fulfilled the Population, Intervention, Control, Outcomes, and Study design selection criteria of: experimental work on hearing impairment OR hearing aid technologies AND listening effort OR fatigue during speech perception. The methods applied in those articles were categorized into subjective, behavioral, and physiological assessment of listening effort. For each study, the statistical analysis addressing research question Q1 and/or Q2 was extracted. In seven articles more than one measure of listening effort was provided. Evidence relating to Q1 was provided by 21 articles that reported 41 relevant findings. Evidence relating to Q2 was provided by 27 articles that reported 56 relevant findings. The quality of evidence on both research questions (Q1 and Q2) was very low, according to the Grading of Recommendations Assessment, Development, and Evaluation Working Group guidelines. We tested the statistical evidence across studies with nonparametric tests. The testing revealed only one consistent effect across studies, namely that listening effort was higher for hearing-impaired listeners compared with normal-hearing listeners (Q1) as measured by electroencephalographic measures. For all other studies, the evidence across studies failed to reveal consistent effects on listening effort. Conclusion: In summary, we could only identify scientific evidence from physiological measurement methods, suggesting that hearing impairment increases listening effort during speech perception (Q1). There was no scientific, finding across studies indicating that hearing aid amplification decreases listening effort (Q2). In general, there were large differences in the study population, the control groups and conditions, and the outcome measures applied between the studies included in this review. The results of this review indicate that published listening effort studies lack consistency, lack standardization across studies, and have insufficient statistical power. The findings underline the need for a common conceptual framework for listening effort to address the current shortcomings.
  •  
30.
  • Ohlenforst, Barbara, et al. (författare)
  • Impact of SNR, masker type and noise reduction processing on sentence recognition performance and listening effort as indicated by the pupil dilation response
  • 2018
  • Ingår i: Hearing Research. - : ELSEVIER SCIENCE BV. - 0378-5955 .- 1878-5891. ; 365, s. 90-99
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent studies have shown that activating the noise reduction scheme in hearing aids results in a smaller peak pupil dilation (PPD), indicating reduced listening effort, at 50% and 95% correct sentence recognition with a 4-talker masker. The objective of this study was to measure the effect of the noise reduction scheme (on or off) on PPD and sentence recognition across a wide range of signal-to-noise ratios (SNRs) from +16 dB to -12 dB and two masker types (4-talker and stationary noise). Relatively low PPDs were observed at very low (-12 dB) and very high (+16 dB to +8 dB) SNRs presumably due to giving up and easy listening, respectively. The maximum PPD was observed with SNRs at approximately 50% correct sentence recognition. Sentence recognition with both masker types was significantly improved by the noise reduction scheme, which corresponds to the shift in performance from SNR function at approximately 5 dB toward a lower SNR. This intelligibility effect was accompanied by a corresponding effect on the PPD, shifting the peak by approximately 4 dB toward a lower SNR. In addition, with the 4-talker masker, when the noise reduction scheme was active, the PPD was smaller overall than that when the scheme was inactive. We conclude that with the 4-talker masker, noise reduction scheme processing provides a listening effort benefit in addition to any effect associated with improved intelligibility. Thus, the effect of the noise reduction scheme on listening effort incorporates more than can be explained by intelligibility alone, emphasizing the potential importance of measuring listening effort in addition to traditional speech reception measures. (C) 2018 Elsevier B.V. All rights reserved.
  •  
31.
  • Ohlenforst, Barbara, et al. (författare)
  • Impact of stimulus-related factors and hearing impairment on listening effort as indicated by pupil dilation
  • 2017
  • Ingår i: Hearing Research. - : Elsevier. - 0378-5955 .- 1878-5891. ; 351, s. 68-79
  • Tidskriftsartikel (refereegranskat)abstract
    • Previous research has reported effects of masker type and signal-to-noise ratio (SNR) on listening effort, as indicated by the peak pupil dilation (PPD) relative to baseline during speech recognition. At about 50% correct sentence recognition performance, increasing SNRs generally results in declining PPDs, indicating reduced effort. However, the decline in PPD over SNRs has been observed to be less pronounced for hearing-impaired (HI) compared to normal-hearing (NH) listeners. The presence of a competing talker during speech recognition generally resulted in larger PPDs as compared to the presence of a fluctuating or stationary background noise. The aim of the present study was to examine the interplay between hearing-status, a broad range of SNRs corresponding to sentence recognition performance varying from 0 to 100% correct, and different masker types (stationary noise and single-talker masker) on the PPD during speech perception. Twenty-five HI and 32 age-matched NH participants listened to sentences across a broad range of SNRs, masked with speech from a single talker (-25 dB to +15 dB SNR) or with stationary noise (-12 dB to +16 dB). Correct sentence recognition scores and pupil responses were recorded during stimulus presentation. With a stationary masker, NH listeners show maximum PPD across a relatively narrow range of low SNRs, while HI listeners show relatively large PPD across a wide range of ecological SNRs. With the single-talker masker, maximum PPD was observed in the mid-range of SNRs around 50% correct sentence recognition performance, while smaller PPDs were observed at lower and higher SNRs. Mixed-model ANOVAs revealed significant interactions between hearing-status and SNR on the PPD for both masker types. Our data show a different pattern of PPDs across SNRs between groups, which indicates that listening and the allocation of effort during listening in daily life environments may be different for NH and HI listeners. (C) 2017 The Authors. Published by Elsevier B.V.
  •  
32.
  • Vestergaard- Knudsen, Line, et al. (författare)
  • Factors Influencing Help Seeking, Hearing Aid Uptake, Hearing Aid Use and Satisfaction With Hearing Aids: A Review of the literature
  • 2010
  • Ingår i: Trends in Amplification. - : Sage Publications. - 1084-7138. ; 14:3, s. 127-154
  • Forskningsöversikt (refereegranskat)abstract
    • Objectives: This descriptive summary of the literature provides an overview of the available studies (published between January 1980 and January 2009) on correlates of help-seeking behavior for hearing loss, hearing-aid uptake, hearing-aid use, and satisfaction with the device. Methods: Publications were identified by structured searches in Pubmed and Cinahl and by inspecting the reference lists of relevant articles. The articles covered different stages that a person with hearing impairment may go through: prior to hearing aid fitting, the period covering the fitting and the period post hearing aid fitting. Inclusion of articles occurred according to strict inclusion and exclusion criteria. Data were extracted by two independent researchers. Thirty-nine papers were included that identified 31 factors examined in relation to the four outcome measures. These covered personal factors (e.g., source of motivation, expectation, attitude), demographic factors (e.g., age, gender) and external factors (e.g., cost, counseling). Only two studies covered the actual fitting process. There was only one factor positively affecting all four outcome variables. This was self-reported hearing disability. The vast majority of studies showed no relationship of age and gender with any of the outcome domains. Discussion and conclusion: Whereas research of the last 28 years yielded valuable information regarding relevant and irrelevant factors in hearing aid health care, there are still many relevant issues that have never been investigated in controlled studies. These are discussed.
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33.
  • Wang, Yang, et al. (författare)
  • Parasympathetic Nervous System Dysfunction, as Identified by Pupil Light Reflex, and Its Possible Connection to Hearing Impairment
  • 2016
  • Ingår i: PLOS ONE. - : PUBLIC LIBRARY SCIENCE. - 1932-6203. ; 11:4, s. e0153566-
  • Tidskriftsartikel (refereegranskat)abstract
    • Context Although the pupil light reflex has been widely used as a clinical diagnostic tool for autonomic nervous system dysfunction, there is no systematic review available to summarize the evidence that the pupil light reflex is a sensitive method to detect parasympathetic dysfunction. Meanwhile, the relationship between parasympathetic functioning and hearing impairment is relatively unknown. Objectives To 1) review the evidence for the pupil light reflex being a sensitive method to evaluate parasympathetic dysfunction, 2) review the evidence relating hearing impairment and parasympathetic activity and 3) seek evidence of possible connections between hearing impairment and the pupil light reflex. Methods Literature searches were performed in five electronic databases. All selected articles were categorized into three sections: pupil light reflex and parasympathetic dysfunction, hearing impairment and parasympathetic activity, pupil light reflex and hearing impairment. Results Thirty-eight articles were included in this review. Among them, 36 articles addressed the pupil light reflex and parasympathetic dysfunction. We summarized the information in these data according to different types of parasympathetic-related diseases. Most of the studies showed a difference on at least one pupil light reflex parameter between patients and healthy controls. Two articles discussed the relationship between hearing impairment and parasympathetic activity. Both studies reported a reduced parasympathetic activity in the hearing impaired groups. The searches identified no results for pupil light reflex and hearing impairment. Discussion and Conclusions As the first systematic review of the evidence, our findings suggest that the pupil light reflex is a sensitive tool to assess the presence of parasympathetic dysfunction. Maximum constriction velocity and relative constriction amplitude appear to be the most sensitive parameters. There are only two studies investigating the relationship between parasympathetic activity and hearing impairment, hence further research is needed. The pupil light reflex could be a candidate measurement tool to achieve this goal.
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34.
  • Wang, Yang, et al. (författare)
  • Pupil light reflex evoked by light-emitting diode and computer screen: Methodology and association with need for recovery in daily life
  • 2018
  • Ingår i: PLOS ONE. - : PUBLIC LIBRARY SCIENCE. - 1932-6203. ; 13:6
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives Pupil light reflex (PLR) has been widely used as a method for evaluating parasympathetic activity. The first aim of the present study is to develop a PLR measurement using a computer screen set-up and compare its results with the PLR generated by a more conventional setup using light-emitting diode (LED). The parasympathetic nervous system, which is known to control the rest and digest response of the human body, is considered to be associated with daily life fatigue. However, only few studies have attempted to test the relationship between self-reported daily fatigue and physiological measurement of the parasympathetic nervous system. Therefore, the second aim of this study was to investigate the relationship between daily-life fatigue, assessed using the Need for Recovery scale, and parasympathetic activity, as indicated by the PLR parameters. Design A pilot study was conducted first to develop a PLR measurement set-up using a computer screen. PLRs evoked by light stimuli with different characteristics were recorded to confirm the influence of light intensity, flash duration, and color on the PLRs evoked by the system. In the subsequent experimental study, we recorded the PLR of 25 adult participants to light flashes generated by the screen set-up as well as by a conventional LED set-up. PLR parameters relating to parasympathetic and sympathetic activity were calculated from the pupil responses. We tested the split-half reliability across two consecutive blocks of trials, and the relationships between the parameters of PLRs evoked by the two set-ups. Participants rated their need for recovery prior to the PLR recordings. Results PLR parameters acquired in the screen and LED set-ups showed good reliability for amplitude related parameters. The PLRs evoked by both set-ups were consistent, but showed systematic differences in absolute values of all parameters. Additionally, higher need for recovery was associated with faster and larger constriction of the PLR. Conclusions This study assessed the PLR generated by a computer screen and the PLR generated by a LED. The good reliability within set-ups and the consistency between the PLRs evoked by the set-ups indicate that both systems provides a valid way to evoke the PLR. A higher need for recovery was associated with faster and larger constricting PLRs, suggesting increased levels of parasympathetic nervous system activity in people experiencing higher levels of need for recovery on a daily basis.
  •  
35.
  • Wang, Yang, et al. (författare)
  • Relations Between Self-Reported Daily-Life Fatigue, Hearing Status, and Pupil Dilation During a Speech Perception in Noise Task
  • 2018
  • Ingår i: Ear and Hearing. - : LIPPINCOTT WILLIAMS & WILKINS. - 0196-0202 .- 1538-4667. ; 39:3, s. 573-582
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: People with hearing impairment are likely to experience higher levels of fatigue because of effortful listening in daily communication. This hearing-related fatigue might not only constrain their work performance but also result in withdrawal from major social roles. Therefore, it is important to understand the relationships between fatigue, listening effort, and hearing impairment by examining the evidence from both subjective and objective measurements. The aim of the present study was to investigate these relationships by assessing subjectively measured daily-life fatigue (self-report questionnaires) and objectively measured listening effort (pupillometry) in both normally hearing and hearing-impaired participants. Design: Twenty-seven normally hearing and 19 age-matched participants with hearing impairment were included in this study. Two self-report fatigue questionnaires Need For Recovery and Checklist Individual Strength were given to the participants before the test session to evaluate the subjectively measured daily fatigue. Participants were asked to perform a speech reception threshold test with single-talker masker targeting a 50% correct response criterion. The pupil diameter was recorded during the speech processing, and we used peak pupil dilation (PPD) as the main outcome measure of the pupillometry. Results: No correlation was found between subjectively measured fatigue and hearing acuity, nor was a group difference found between the normally hearing and the hearing-impaired participants on the fatigue scores. A significant negative correlation was found between self-reported fatigue and PPD. A similar correlation was also found between Speech Intelligibility Index required for 50% correct and PPD. Multiple regression analysis showed that factors representing "hearing acuity" and "self-reported fatigue" had equal and independent associations with the PPD during the speech in noise test. Less fatigue and better hearing acuity were associated with a larger pupil dilation. Conclusions: To the best of our knowledge, this is the first study to investigate the relationship between a subjective measure of daily-life fatigue and an objective measure of pupil dilation, as an indicator of listening effort. These findings help to provide an empirical link between pupil responses, as observed in the laboratory, and daily-life fatigue.
  •  
36.
  • Wang, Yang, et al. (författare)
  • The Pupil Dilation Response During Speech Perception in Dark and Light: The Involvement of the Parasympathetic Nervous System in Listening Effort
  • 2018
  • Ingår i: TRENDS IN HEARING. - : SAGE PUBLICATIONS INC. - 2331-2165. ; 22
  • Tidskriftsartikel (refereegranskat)abstract
    • Recently, the measurement of the pupil dilation response has been applied in many studies to assess listening effort. Meanwhile, the mechanisms underlying this response are still largely unknown. We present the results of a method that separates the influence of the parasympathetic and sympathetic branches of the autonomic nervous system on the pupil response during speech perception. This is achieved by changing the background illumination level. In darkness, the influence of the parasympathetic nervous system on the pupil response is minimal, whereas in light, there is an additional component from the parasympathetic nervous system. Nineteen hearing-impaired and 27 age-matched normal-hearing listeners performed speech reception threshold tests targeting a 50% correct performance level while pupil responses were recorded. The target speech was masked with a competing talker. The test was conducted twice, once in dark and once in a light condition. Need for Recovery and Checklist Individual Strength questionnaires were acquired as indices of daily-life fatigue. In dark, the peak pupil dilation (PPD) did not differ between the two groups, but in light, the normal-hearing group showed a larger PPD than the hearing-impaired group. Listeners with better hearing acuity showed larger differences in dilation between dark and light. These results indicate a larger effect of parasympathetic inhibition on the pupil dilation response of listeners with better hearing acuity, and a relatively high parasympathetic activity in those with worse hearing. Previously observed differences in PPD between normal and impaired listeners are probably not solely because of differences in listening effort.
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37.
  •  
38.
  • Wendt, Dorothea, et al. (författare)
  • Toward a more comprehensive understanding of the impact of masker type and signal-to-noise ratio on the pupillary response while performing a speech-in-noise test
  • 2018
  • Ingår i: Hearing Research. - : Elsevier. - 0378-5955 .- 1878-5891. ; 369, s. 67-78
  • Tidskriftsartikel (refereegranskat)abstract
    • Difficulties arising in everyday speech communication often result from the acoustical environment, which may contain interfering background noise or competing speakers. Thus, listening and understanding speech in noise can be exhausting. Two experiments are presented in the current study that further explored the impact of masker type and Signal-to-Noise Ratio (SNR) on listening effort by means of pupillometry. In both studies, pupillary responses of participants were measured while performing the Danish Hearing in Noise Test (HINT; Nielsen and Dau, 2011). The first experiment aimed to replicate and extend earlier observed effects of noise type and semantic interference on listening effort (Koelewijn et al., 2012). The impact of three different masker types, i.e. a fluctuating noise, a 1-talker masker and a 4-talker masker on listening effort was examined at a fixed speech intelligibility. In a second experiment, effects of SNR on listening effort were examined while presenting the HINT sentences across a broad range of fixed SNRs corresponding to intelligibility scores ranging from 100% to 0% correct performance. A peak pupil dilation (PPD) was calculated and a Growth Curve Analysis (GCA) was performed to examine listening effort involved in speech recognition as a function of SNR. The results of two experiments showed that the pupil dilation response is highly affected by both masker type and SNR when performing the HINT. The PPD was highest, suggesting the highest level of effort, for speech recognition in the presence of the 1-talker masker in comparison to the 4-talker babble and the fluctuating noise masker. However, the disrupting effect of one competing talker disappeared for intelligibly levels around 50%. Furthermore, it was demonstrated that the pupillary response strongly varied as a function of SNRs. Listening effort was highest for intermediate SNRs with performance accuracies ranging between 30% and 70% correct. GCA revealed time-dependent effects of the SNR on the pupillary response that were not reflected in the PPD. (C) 2018 Elsevier B.V. All rights reserved.
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39.
  • Zekveld, Adriana A, et al. (författare)
  • Cognitive Abilities Relate to Self-Reported Hearing Disability
  • 2013
  • Ingår i: Journal of Speech, Language and Hearing Research. - : American Speech-Language-Hearing Association. - 1092-4388 .- 1558-9102. ; 56:5, s. 1364-1372
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: In this explorative study, the authors investigated the relationship between auditory and cognitive abilities and self-reported hearing disability. less thanbrgreater than less thanbrgreater thanMethod: Thirty-two adults with mild to moderate hearing loss completed the Amsterdam Inventory for Auditory Disability and Handicap (AIADH; Kramer, Kapteyn, Festen, andamp; Tobi, 1996) and performed the Text Reception Threshold (TRT; Zekveld, George, Kramer, Goverts, andamp; Houtgast, 2007) test as well as tests of spatial working memory (SWM) and visual sustained attention. Regression analyses examined the predictive value of age, hearing thresholds (pure-tone averages [PTAs]), speech perception in noise (speech reception thresholds in noise [SRTNs]), and the cognitive tests for the 5 AIADH factors. less thanbrgreater than less thanbrgreater thanResults: Besides the variance explained by age, PTA, and SRTN, cognitive abilities were related to each hearing factor. The reported difficulties with sound detection and speech perception in quiet were less severe for participants with higher age, lower PTAs, and better TRTs. Fewer sound localization and speech perception in noise problems were reported by participants with better SRTNs and smaller SWM. Fewer sound discrimination difficulties were reported by subjects with better SRTNs and TRTs and smaller SWM. less thanbrgreater than less thanbrgreater thanConclusions: The results suggest a general role of the ability to read partly masked text in subjective hearing. Large working memory was associated with more reported hearing difficulties. This study shows that besides auditory variables and age, cognitive abilities are related to self-reported hearing disability.
  •  
40.
  • Zekveld, Adriana A, et al. (författare)
  • Task Difficulty Differentially Affects Two Measures of Processing Load: The Pupil Response During Sentence Processing and Delayed Cued Recall of the Sentences
  • 2013
  • Ingår i: Journal of Speech, Language and Hearing Research. - : American Speech-Language-Hearing Association. - 1092-4388 .- 1558-9102. ; 56:4, s. 1156-1165
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: In this study, the authors assessed the influence of masking level (29% or 71% sentence perception) and test modality on the processing load during language perception as reflected by the pupil response. In addition, the authors administered a delayed cued stimulus recall test to examine whether processing load affected the encoding of the stimuli in memory. less thanbrgreater than less thanbrgreater thanMethod: Participants performed speech and text reception threshold tests, during which the pupil response was measured. In the cued recall test, the first half of correctly perceived sentences was presented, and participants were asked to complete the sentences. Reading and listening span tests of working memory capacity were presented as well. less thanbrgreater than less thanbrgreater thanResults: Regardless of test modality, the pupil response indicated higher processing load in the 29% condition than in the 71% correct condition. Cued recall was better for the 29% condition. less thanbrgreater than less thanbrgreater thanConclusions: The consistent effect of masking level on the pupil response during listening and reading support the validity of the pupil response as a measure of processing load during language perception. The absent relation between pupil response and cued recall may suggest that cued recall is not directly related to processing load, as reflected by the pupil response.
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41.
  • Zekveld, Adriana, et al. (författare)
  • Cognitive processing load across a wide range of listening conditions: Insights from pupillometry
  • 2014
  • Ingår i: Psychophysiology. - : Wiley. - 0048-5772 .- 1469-8986. ; 51:3, s. 277-284
  • Tidskriftsartikel (refereegranskat)abstract
    • The pupil response to speech masked by interfering speech was assessed across an intelligibility range from 0% to 99% correct. In total, 37 participants aged between 18 and 36 years and with normal hearing were included. Pupil dilation was largest at intermediate intelligibility levels, smaller at high intelligibility, and slightly smaller at very difficult levels. Participants who reported that they often gave up listening at low intelligibility levels had smaller pupil dilations in these conditions. Participants who were good at reading masked text had relatively large pupil dilation when intelligibility was low. We conclude that the pupil response is sensitive to processing load, and possibly reflects cognitive overload in difficult conditions. It seems affected by methodological aspects and individual abilities, but does not reflect subjective ratings.
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42.
  • Zekveld, Adriana, et al. (författare)
  • Cognitive processing load during listening is reduced more by decreasing voice similarity than by increasing spatial separation between target and masker speech
  • 2014
  • Ingår i: Frontiers in Neuroscience. - : Frontiers. - 1662-4548 .- 1662-453X. ; 8:88
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigated changes in speech recognition and cognitive processing load due to the masking release attributable to decreasing similarity between target and masker speech. This was achieved by using masker voices with either the same (female) gender as the target speech or different gender (male) and/or by spatially separating the target and masker speech using HRTFs. We assessed the relation between the signal-to-noise ratio required for 50% sentence intelligibility, the pupil response and cognitive abilities. We hypothesized that the pupil response, a measure of cognitive processing load, would be larger for co-located maskers and for same-gender compared to different-gender maskers. We further expected that better cognitive abilities would be associated with better speech perception and larger pupil responses as the allocation of larger capacity may result in more intense mental processing. In line with previous studies, the performance benefit from different-gender compared to same-gender maskers was larger for co-located masker signals. The performance benefit of spatially-separated maskers was larger for same-gender maskers. The pupil response was larger for same-gender than for different-gender maskers, but was not reduced by spatial separation. We observed associations between better perception performance and better working memory, better information updating, and better executive abilities when applying no corrections for multiple comparisons. The pupil response was not associated with cognitive abilities. Thus, although both gender and location differences between target and masker facilitate speech perception, only gender differences lower cognitive processing load. Presenting a more dissimilar masker may facilitate target-masker separation at a later (cognitive) processing stage than increasing the spatial separation between the target and masker. The pupil response provides information about speech perception that complements intelligibility data.
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43.
  • Zekveld, Adriana, et al. (författare)
  • Cognitive processing load during listening is reduced more by decreasing voice similarity than by increasing spatial separation between target and masker speech
  • 2015
  • Konferensbidrag (refereegranskat)abstract
    • We investigated changes in speech recognition and cognitive processing load attributable to decreasing similarity between target and masker speech. We presented masker voices with either the same (female) gender or different gender (male) as the target speech, and/or spatially separated the target and masker speech using HRTFs. We assessed the relation between speech perception performance, the pupil response and cognitive abilities in 24 normal-hearing adults. We hypothesized that the pupil response, a measure of cognitive processing load, would be larger for co-located maskers and for same-gender compared to different-gender maskers. We further expected that better cognitive abilities would be associated with better speech perception and larger pupil responses, as the allocation of larger capacity may result in more intense mental processing.In line with previous studies, the performance benefit from different-gender compared to same-gender maskers was larger for co-located masker signals. The performance benefit of spatially-separated maskers was larger for same-gender maskers. The pupil response was larger for same-gender than for different-gender maskers, but was not reduced by spatial separation. We observed associations between better perception performance and better working memory, better information updating, and better executive abilities. The pupil response was not associated with cognitive abilities. Thus, although both gender and location differences between target and masker facilitate speech perception, only gender differences lower cognitive processing load. Increasing target-masker voice dissimilarity may facilitate target-speech perception at a later (cognitive) processing stage than increasing spatial separation. The pupil response provides information that complements speech intelligibility data.
  •  
44.
  • Zekveld, Adriana, 1981-, et al. (författare)
  • In a Concurrent Memory and Auditory Perception Task, the Pupil Dilation Response Is More Sensitive to Memory Load Than to Auditory Stimulus Characteristics
  • 2019
  • Ingår i: Ear and Hearing. - : Lippincott Williams & Wilkins. - 0196-0202 .- 1538-4667. ; 40:2, s. 272-286
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: Speech understanding may be cognitively demanding, but it can be enhanced when semantically related text cues precede auditory sentences. The present study aimed to determine whether (a) providing text cues reduces pupil dilation, a measure of cognitive load, during listening to sentences, (b) repeating the sentences aloud affects recall accuracy and pupil dilation during recall of cue words, and (c) semantic relatedness between cues and sentences affects recall accuracy and pupil dilation during recall of cue words.Design: Sentence repetition following text cues and recall of the text cues were tested. Twenty-six participants (mean age, 22 years) with normal hearing listened to masked sentences. On each trial, a set of four-word cues was presented visually as text preceding the auditory presentation of a sentence whose meaning was either related or unrelated to the cues. On each trial, participants first read the cue words, then listened to a sentence. Following this they spoke aloud either the cue words or the sentence, according to instruction, and finally on all trials orally recalled the cues. Peak pupil dilation was measured throughout listening and recall on each trial. Additionally, participants completed a test measuring the ability to perceive degraded verbal text information and three working memory tests (a reading span test, a size-comparison span test, and a test of memory updating).Results: Cue words that were semantically related to the sentence facilitated sentence repetition but did not reduce pupil dilation. Recall was poorer and there were more intrusion errors when the cue words were related to the sentences. Recall was also poorer when sentences were repeated aloud. Both behavioral effects were associated with greater pupil dilation. Larger reading span capacity and smaller size-comparison span were associated with larger peak pupil dilation during listening. Furthermore, larger reading span and greater memory updating ability were both associated with better cue recall overall.Conclusions: Although sentence-related word cues facilitate sentence repetition, our results indicate that they do not reduce cognitive load during listening in noise with a concurrent memory load. As expected, higher working memory capacity was associated with better recall of the cues. Unexpectedly, however, semantic relatedness with the sentence reduced word cue recall accuracy and increased intrusion errors, suggesting an effect of semantic confusion. Further, speaking the sentence aloud also reduced word cue recall accuracy, probably due to articulatory suppression. Importantly, imposing a memory load during listening to sentences resulted in the absence of formerly established strong effects of speech intelligibility on the pupil dilation response. This nullified intelligibility effect demonstrates that the pupil dilation response to a cognitive (memory) task can completely overshadow the effect of perceptual factors on the pupil dilation response. This highlights the importance of taking cognitive task load into account during auditory testing.
  •  
45.
  • Zekveld, Adriana, et al. (författare)
  • The Pupil Dilation Response to Auditory Stimuli: Current State of Knowledge
  • 2018
  • Ingår i: TRENDS IN HEARING. - : SAGE PUBLICATIONS INC. - 2331-2165. ; 22
  • Forskningsöversikt (refereegranskat)abstract
    • The measurement of cognitive resource allocation during listening, or listening effort, provides valuable insight in the factors influencing auditory processing. In recent years, many studies inside and outside the field of hearing science have measured the pupil response evoked by auditory stimuli. The aim of the current review was to provide an exhaustive overview of these studies. The 146 studies included in this review originated from multiple domains, including hearing science and linguistics, but the review also covers research into motivation, memory, and emotion. The present review provides a unique overview of these studies and is organized according to the components of the Framework for Understanding Effortful Listening. A summary table presents the sample characteristics, an outline of the study design, stimuli, the pupil parameters analyzed, and the main findings of each study. The results indicate that the pupil response is sensitive to various task manipulations as well as interindividual differences. Many of the findings have been replicated. Frequent interactions between the independent factors affecting the pupil response have been reported, which indicates complex processes underlying cognitive resource allocation. This complexity should be taken into account in future studies that should focus more on interindividual differences, also including older participants. This review facilitates the careful design of new studies by indicating the factors that should be controlled for. In conclusion, measuring the pupil dilation response to auditory stimuli has been demonstrated to be sensitive method applicable to numerous research questions. The sensitivity of the measure calls for carefully designed stimuli.
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