August 2014
Volume 14, Issue 10
Vision Sciences Society Annual Meeting Abstract  |   August 2014
Dominance of apparent motion in binocular rivalry is modulated by crossmodal synchrony
Author Affiliations
  • Daniela Etchegaray
    Universidad Nacional Autonoma de Mexico
  • Laura Ortega
    Universidad Nacional Autonoma de Mexico
  • Jin Hak Kim
    Universidad Nacional Autonoma de Mexico
  • German Palafox
    Universidad Nacional Autonoma de Mexico
  • Emmanuel Guzman-Martinez
    Universidad Nacional Autonoma de Mexico
Journal of Vision August 2014, Vol.14, 1249. doi:
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      Daniela Etchegaray, Laura Ortega, Jin Hak Kim, German Palafox, Emmanuel Guzman-Martinez; Dominance of apparent motion in binocular rivalry is modulated by crossmodal synchrony. Journal of Vision 2014;14(10):1249.

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      © ARVO (1962-2015); The Authors (2016-present)

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Previous studies show that visual motion perception can be altered by auditory stimuli; for example, a sound burst in phase with a virtual visual collision can bias the perception of motion (Rosenthal et al., 2009). In relation to shape perception, Plass et al. (2013), showed that crossmodal interactions biased awareness in a binocular rivalry setup. Here we investigated if auditory-visual synchrony plays a role in crossmodal awareness of visual motion using a CFS task. We presented to the non dominant eye a clockwise-rotational apparent motion display at a10 Hz frame rate (producing robust apparent motion), and a mondrian composed of random pieces of the apparent motion display to the dominant eye. Participants reported if they perceived either the coherent motion or the mondrian in 7 seconds trials under four conditions: synchronous (a 10 ms burst of white noise was in phase with the frame rate); asynchronous (the burst was in antiphase with the frame rate); no sound (no burst was presented); and catch trials (simulated rivalry). We found that dominance of apparent motion is boosted when synchronized with a sound burst; when the sound is asynchronous with the motion display, dominance is similar to the no sound condition. These results suggest that timing is an important factor in awareness of crossmodal binding.

Meeting abstract presented at VSS 2014


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