| 1. |
- Engström, Elisabet, et al.
(författare)
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Computer-assisted reading intervention for children with sensorineural hearing loss using hearing aids : Effects on auditory event-related potentials and mismatch negativity
- 2019
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Ingår i: International Journal of Pediatric Otorhinolaryngology. - : Elsevier. - 0165-5876 .- 1872-8464. ; 117, s. 17-25
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The primary aim was to investigate whether computer-assisted reading intervention somehow can affect event-related potentials (ERP) and mismatch negativity (MMN) in hearing impaired (HI) children with hearing aids (HAs) and normal hearing (NH) children.METHODS: The study included 15 HI children with sensorineural hearing loss (SNHL) using bilateral HAs and 14 NH children as a reference group; all children between the ages of 5 and 8. A multi-feature MMN-paradigm, Optimum-1, with a standard stimulus alternating with 5 different deviants was used. ERPs were recorded pre and post intervention, i.e. one month of repeatedly computer-assisted training (GraphoGame). MMN was calculated from the average ERP of each deviant minus standard. Data were based on samples within a specific time interval, 80-224 ms, and repeated measures ANOVA was used to analyze possible interactions.RESULTS: There was a significant difference between groups before training, though, the mean obligatory responses or MMN was not statistically significantly different before versus after training, neither among the NH nor the HI children. Further, the HI children did generally achieve lower levels in GraphoGame compared to the NH children. Altogether, our findings indicate differences between the groups and that training may affect the neurophysiological processing in the brain, gaining the HI children. Both MMN and positive mismatch response (pMMR) were seen among both the HA and NH children, irrespective to deviant type. Individually, changes of the MMN and pMMR after training seem unpredictable.CONCLUSION: There are statistically significant differences in both the obligatory responses in ERP and the MMNs between the NH and HI groups before the computer-assisted training. Though, these differences disappear after the intervention. This suggests possible training effects regarding the central auditory processing among the HI children.
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| 2. |
- Kallioinen, Petter, et al.
(författare)
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Semantic Processing in Deaf and Hard-of-Hearing Children : Large N400 Mismatch Effects in Brain Responses, Despite Poor Semantic Ability
- 2016
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Ingår i: Frontiers in Psychology. - London : Frontiers Media SA. - 1664-1078. ; 7
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Tidskriftsartikel (refereegranskat)abstract
- Difficulties in auditory and phonological processing affect semantic processing in speech comprehension for deaf and hard-of-hearing (DHH) children. However, little is known about brain responses related to semantic processing in this group. We investigated event-related potentials (ERPs) in DHH children with cochlear implants (CIs) and/or hearing aids (HAs), and in normally hearing controls (NH). We used a semantic priming task with spoken word primes followed by picture targets. In both DHH children and controls, cortical response differences between matching and mismatching targets revealed a typical N400 effect associated with semantic processing. Children with CI had the largest mismatch response despite poor semantic abilities overall; Children with CI also had the largest ERP differentiation between mismatch types, with small effects in within-category mismatch trials (target from same category as prime) and large effects in between-category mismatch trials (where target is from a different category than prime), compared to matching trials. Children with NH and HA had similar responses to both mismatch types. While the large and differentiated ERP responses in the CI group were unexpected and should be interpreted with caution, the results could reflect less precision in semantic processing among children with CI, or a stronger reliance on predictive processing.
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| 3. |
- Nakeva von Mentzer, Cecilia, et al.
(författare)
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Segmental and suprasegmental properties in nonword repetition : An explorative study of the associations with nonword decoding in children with normal hearing and children with bilateral cochlear implants
- 2015
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Ingår i: Clinical Linguistics & Phonetics. - London, UK : Informa Healthcare. - 0269-9206 .- 1464-5076. ; 29:3, s. 216-235
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Tidskriftsartikel (refereegranskat)abstract
- The present study explored nonword repetition (NWR) and nonword decoding in normalhearing (NH) children and in children with cochlear implants (CIs). Participants were 11 children with bilateral CIs, 5:0-7:11 years (M = 6.5 yrs.), and 11 NH children, individually age-matched to the children with CIs. The purpose was twofold; to thoroughly describe aspects of repetition and decoding of novel words and to study possible associations between them. All children were assessed after having practiced with a computer-assisted reading intervention with a phonics approach during four weeks. Results showed that NH children outperformed children with CIs on the majority of aspects of NWR. The analysis of syllable length in NWR revealed that children with CIs made more syllable omissions than did the NH children, and predominantly in prestressed positions. Additionally, the consonant cluster analysis showed significantly more consonant omissions and substitutions in children with CIs suggesting that reaching fine- grained levels of phonological processing was particularly difficult for these children. No significant difference was found for decoding accuracy between the groups, as measured by percent nonwords and percent phonemes correctly decoded, but differences were observed regarding error patterns. Further, phoneme deletions and lexicalizing of nonwords occurred more often in children with CIs than in those with NH. The correlation analysis revealed that the ability to repeat consonant clusters in NWR had the strongest associations to nonword decoding in both groups.
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| 4. |
- Schwarz, Iris-Corinna, 1976-, et al.
(författare)
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Pupil dilation indicates auditory signal detection - towards an objective hearing test based on eye-tracking
- 2016
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Konferensbidrag (refereegranskat)abstract
- Purpose: The long-term objective of this project is to develop an objective hearing threshold test that can be used in early infancy, using pupildilation as an indicator of hearing. The study purposes are 1) to identify relevant time-windows for analysis of pupillary responses to various auditory stimuli in adults, and 2) to evaluate a trial-minus-baseline approach to deal with unrelated pupillary responses in adults. Method: Participants’ pupil size is recorded using a Tobii T120 Eye-tracker. In the first test, participants fixate on a blank screen while sound stimuli are presented. From this data, typical pupillary responses and the relevant analysis time-window is determined and used in future tests. In the second test, participants watch movie clips while sound stimuli are presented. Visually identical sound and no-sound trials will be compared in order to isolate the pupillary changes tied to hearing sound from those related to changes in brightness in the visual stimuli. Results and conclusion: Data is currently being collected. Results from the pilot study indicate that the pupillary response related to sound detection occurs at around 900 ms after stimulus onset, and that a trial-minus-baseline approach is a viable option to eliminate unrelated pupillary responses.
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| 5. |
- Uhlen, Inger, et al.
(författare)
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Using a multi-feature paradigm to measure mismatch responses to minimal sound contrasts in children with cochlear implants and hearing aids
- 2017
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Ingår i: Scandinavian Journal of Psychology. - Oxford, UK : Blackwell Publishing. - 0036-5564 .- 1467-9450. ; 58:5, s. 409-421
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Tidskriftsartikel (refereegranskat)abstract
- Our aim was to explore whether a multi-feature paradigm (Optimum-1) for eliciting mismatch negativity (MMN) would objectively capture difficulties in perceiving small sound contrasts in children with hearing impairment (HI) listening through their hearing aids (HAs) and/or cochlear implants (CIs). Children aged 5-7 years with HAs, CIs and children with normal hearing (NH) were tested in a free-field setting using a multi-feature paradigm with deviations in pitch, intensity, gap, duration, and location. There were significant mismatch responses across all subjects that were positive (p-MMR) for the gap and pitch deviants (F(1,43) = 5.17, p = 0.028 and F(1,43) = 6.56, p = 0.014, respectively) and negative (MMN) for the duration deviant (F(1,43) = 4.74, p = 0.035). Only the intensity deviant showed a significant group interaction with MMN in the HA group and p-MMR in the CI group (F(2,43) = 3.40, p = 0.043). The p-MMR correlated negatively with age, with the strongest correlation in the NH subjects. In the CI group, the late discriminative negativity (LDN) was replaced by a late positivity with a significant group interaction for the location deviant. Children with severe HI can be assessed through their hearing device with a fast multi-feature paradigm. For further studies a multi-feature paradigm including more complex speech sounds may better capture variation in auditory processing in these children.
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