Temporal Integration of Auditory Stimulation and Binocular Disparity Signals
Several studies using visual objects defined by luminance have reported that the auditory event must be presented 30 to 40 ms after the visual stimulus to perceive audiovisual synchrony. In the present study, we used visual objects defined only by their binocular disparity. We measured the optimal l...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2011-10-01
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| Series: | i-Perception |
| Online Access: | https://doi.org/10.1068/ic897 |
| _version_ | 1828886569528852480 |
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| author | Marina Zannoli John Cass David Alais Pascal Mamassian |
| author_facet | Marina Zannoli John Cass David Alais Pascal Mamassian |
| author_sort | Marina Zannoli |
| collection | DOAJ |
| description | Several studies using visual objects defined by luminance have reported that the auditory event must be presented 30 to 40 ms after the visual stimulus to perceive audiovisual synchrony. In the present study, we used visual objects defined only by their binocular disparity. We measured the optimal latency between visual and auditory stimuli for the perception of synchrony using a method introduced by Moutoussis & Zeki (1997). Visual stimuli were defined either by luminance and disparity or by disparity only. They moved either back and forth between 6 and 12 arcmin or from left to right at a constant disparity of 9 arcmin. This visual modulation was presented together with an amplitude-modulated 500 Hz tone. Both modulations were sinusoidal (frequency: 0.7 Hz). We found no difference between 2D and 3D motion for luminance stimuli: a 40 ms auditory lag was necessary for perceived synchrony. Surprisingly, even though stereopsis is often thought to be slow, we found a similar optimal latency in the disparity 3D motion condition (55 ms). However, when participants had to judge simultaneity for disparity 2D motion stimuli, it led to larger latencies (170 ms), suggesting that stereo motion detectors are poorly suited to track 2D motion. |
| first_indexed | 2024-12-13T11:48:11Z |
| format | Article |
| id | doaj.art-1c21a54eb4f4460298ad55fa54e83465 |
| institution | Directory Open Access Journal |
| issn | 2041-6695 |
| language | English |
| last_indexed | 2024-12-13T11:48:11Z |
| publishDate | 2011-10-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | i-Perception |
| spelling | doaj.art-1c21a54eb4f4460298ad55fa54e834652022-12-21T23:47:27ZengSAGE Publishingi-Perception2041-66952011-10-01210.1068/ic89710.1068_ic897Temporal Integration of Auditory Stimulation and Binocular Disparity SignalsMarina Zannoli0John Cass1David Alais2Pascal Mamassian3Université Paris DescartesUniversity of Western SydneyUniversity of SydneyUniversité Paris DescartesSeveral studies using visual objects defined by luminance have reported that the auditory event must be presented 30 to 40 ms after the visual stimulus to perceive audiovisual synchrony. In the present study, we used visual objects defined only by their binocular disparity. We measured the optimal latency between visual and auditory stimuli for the perception of synchrony using a method introduced by Moutoussis & Zeki (1997). Visual stimuli were defined either by luminance and disparity or by disparity only. They moved either back and forth between 6 and 12 arcmin or from left to right at a constant disparity of 9 arcmin. This visual modulation was presented together with an amplitude-modulated 500 Hz tone. Both modulations were sinusoidal (frequency: 0.7 Hz). We found no difference between 2D and 3D motion for luminance stimuli: a 40 ms auditory lag was necessary for perceived synchrony. Surprisingly, even though stereopsis is often thought to be slow, we found a similar optimal latency in the disparity 3D motion condition (55 ms). However, when participants had to judge simultaneity for disparity 2D motion stimuli, it led to larger latencies (170 ms), suggesting that stereo motion detectors are poorly suited to track 2D motion.https://doi.org/10.1068/ic897 |
| spellingShingle | Marina Zannoli John Cass David Alais Pascal Mamassian Temporal Integration of Auditory Stimulation and Binocular Disparity Signals i-Perception |
| title | Temporal Integration of Auditory Stimulation and Binocular Disparity Signals |
| title_full | Temporal Integration of Auditory Stimulation and Binocular Disparity Signals |
| title_fullStr | Temporal Integration of Auditory Stimulation and Binocular Disparity Signals |
| title_full_unstemmed | Temporal Integration of Auditory Stimulation and Binocular Disparity Signals |
| title_short | Temporal Integration of Auditory Stimulation and Binocular Disparity Signals |
| title_sort | temporal integration of auditory stimulation and binocular disparity signals |
| url | https://doi.org/10.1068/ic897 |
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