| 1. |
- Tajadura, Ana, 1979, et al.
(författare)
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Affective multimodal displays: Acoustic spectra modulates perception of auditory-tactile signals
- 2008
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Ingår i: International Conference of Auditory Dispaly, ICAD08, Paris, 2008..
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Konferensbidrag (refereegranskat)abstract
- Emotional events may interrupt ongoing cognitive processes and automatically grab attention, modulating the subsequentperceptual processes. Hence, emotional eliciting stimuli might effectively be used in warning applications, where a fast and accurate response from users is required. In addition, conveying information through an optimum multisensory combination can lead to a further enhancement of user responses. In the present study we investigated the emotional response to sounds differing in their acoustic spectra, and their influence on speeded detection of auditory-somatosensory stimuli. Higher soundfrequencies resulted in an increase in emotional arousal. We suggest that emotional processes might be responsible for the different auditory-somatosensory integration patterns observed for low and high frequency sounds. The presented results might have important implications for the design of auditory and multisensory warning interfaces.
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| 2. |
- Tajadura, Ana, 1979, et al.
(författare)
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Auditory–somatosensory multisensory interactions are spatially modulated by stimulated body surface and acoustic spectra
- 2009
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Ingår i: Neuropsychologia. - : Elsevier BV. - 0028-3932. ; 47:1, s. 195-203
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Tidskriftsartikel (refereegranskat)abstract
- Previous research has provided inconsistent results regarding the spatial modulation of auditory–somatosensory interactions. The present study reports three experiments designed to investigate the nature of these interactions in the space close to the head. Human participants made speeded detection responses to unimodal auditory, somatosensory, or simultaneous auditory–somatosensory stimuli. In Experiment 1, electrocutaneous stimuli were presented to either earlobe, while auditory stimuli were presented from the same versus opposite sides, and from one of two distances (20 vs. 70 cm) from the participant's head. The results demonstrated a spatial modulation of auditory–somatosensory interactions when auditory stimuli were presented from close to the head. In Experiment 2, electrocutaneous stimuli were delivered to the hands, which were placed either close to or far from the head, while the auditory stimuli were again presented at one of two distances. The results revealed that the spatial modulation observed in Experiment 1 was specific to the particular body part stimulated (head) rather than to the region of space (i.e. around the head) where the stimuli were presented. The results of Experiment 3 demonstrate that sounds that contain high-frequency components are particularly effective in eliciting this auditory–somatosensory spatial effect. Taken together, these findings help to resolve inconsistencies in the previous literature and suggest that auditory–somatosensory multisensory integration is modulated by the stimulated body surface and acoustic spectra of the stimuli presented.
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| 3. |
- Tajadura, Ana, 1979, et al.
(författare)
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Spatial modulation of auditory-somatosensory interactions: effects of stimulated body surface and acoustic spectra
- 2008
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Ingår i: International Multisensory Research Forum, IMRF08, Hamburg, 2008..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Recent research on auditory-somatosensory interactions has shown contradictory results regarding the spatial modulation. In the present study we report on three experiments on auditory-somatosensory interactions in the region close to the head. Participants made speeded simple detection responses to single auditory, somatosensory or double simultaneous auditory-somatosensory stimuli. In Experiment 1, electrocutaneous stimuli were presented to either earlobe, while auditory stimuli were presented from the same versus different sides, and from one of two distances (20 or 70 cm) from the participant’s head. The results demonstrated a spatial modulation of auditory-somatosensory interactions, especially when auditory stimuli were presented from close to the head. Experiment 2, with electrocutaneous stimuli delivered to the hands (placed either close to, or far from, the participants’ head), suggests that the spatial modulation is dependent on the particular body part stimulated (head) rather than on the region of space (around the head) where the stimuli is presented. Experiment 3 showed that this auditory-somatosensory spatial effect occurs primarily for sounds containing high-frequency components. Taken together, these results suggest that the auditory-somatosensory multisensory integration might be facilitated by stimuli occurring at the same location, and that this integration is modulated by the stimulated body surface and acoustic spectra.
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| 4. |
- Tajadura, Ana, 1979, et al.
(författare)
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Whole-body vibration influence sound localization in the median plane.
- 2007
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Ingår i: 10th Annual International Workshop on Presence, Barcelona, Spain, October 2007..
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Konferensbidrag (refereegranskat)abstract
- The perceived location of events occurring in a mediated environment modulates the users’ understanding and involvement in these events. Previous research has shown that when spatially discrepant information is available at various sensory channels, the perceived location of unisensory events might be altered. Tactile “capture” of audition has been reported for lateral sounds. The present study investigates whether auditory localization on the median plane could be altered by concurrent whole-body vibration. Sounds were presented at the front or the back of participants, in isolation or together with vibrations. Subjects made a three alternative forced choice regarding their perceived location of sound (“front”, “back” or “center”). Results indicate that vibrations synchronous with sound affected subjects’ sound localization, significantly reducing the accuracy on front sound localization in favor of “back” and “center” responses. This research might have implications for the design of multimodal environments, especially for those aiming at creating a sense of presence or inducing affective experiences in users.
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