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      Attentional modulations of audiovisual interactions in apparent motion: Temporal ventriloquism effects on perceived visual speed

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      Author(s)
      Duyar, Aysun
      Pavan, Andrea
      Date
      2022-08-22
      Source Title
      Attention, Perception & Psychophysics
      Print ISSN
      1943-3921
      Electronic ISSN
      1943-393X
      Publisher
      Springer New York LLC
      Volume
      84
      Issue
      7
      Pages
      2167 - 2185
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The timing of brief stationary sounds has been shown to alter different aspects of visual motion, such as speed estimation. These effects of auditory timing have been explained by temporal ventriloquism and auditory dominance over visual information in the temporal domain. Although previous studies provide unprecedented evidence for the multisensory nature of speed estimation, how attention is involved in these audiovisual interactions remains unclear. Here, we aimed to understand the effects of spatial attention on these audiovisual interactions in time. We utilized a set of audiovisual stimuli that elicit temporal ventriloquism in visual apparent motion and asked participants to perform a speed comparison task. We manipulated attention either in the visual or auditory domain and systematically changed the number of moving objects in the visual field. When attention was diverted to a stationary object in the visual field via a secondary task, the temporal ventriloquism effects on perceived speed decreased. On the other hand, focusing attention on the auditory stimuli facilitated these effects consistently across different difficulty levels of secondary auditory task. Moreover, the effects of auditory timing on perceived speed did not change with the number of moving objects and existed in all the experimental conditions. Taken together, our findings revealed differential effects of allocating attentional resources in the visual and auditory domains. These behavioral results also demonstrate that reliable temporal ventriloquism effects on visual motion can be induced even in the presence of multiple moving objects in the visual field and under different perceptual load conditions.
      Keywords
      Motion
      Attention
      Speed perception
      Multisensory
      Audiovisual interactions
      Temporal processing
      Permalink
      http://hdl.handle.net/11693/111911
      Published Version (Please cite this version)
      https://doi.org/10.3758/s13414-022-02555-7
      Collections
      • Aysel Sabuncu Brain Research Center (BAM) 249
      • Department of Psychology 242
      • National Magnetic Resonance Research Center (UMRAM) 301
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