Department of Cognitive Neuropsychology, Tilburg University, Warandelaan 2, P.O. Box 90153, 5000, LE, Tilburg, the Netherlands.
Department of Cognitive Neuropsychology, Tilburg University, Warandelaan 2, P.O. Box 90153, 5000, LE, Tilburg, the Netherlands.
Cognition. 2020 Nov;204:104340. doi: 10.1016/j.cognition.2020.104340. Epub 2020 Jun 20.
A sound can cause 2 visual streaming objects appear to bounce (the audiovisual bounce-inducing effect, ABE). Here we examined whether the stream/bounce percept affects perception of audiovisual synchrony. Participants saw 2 disks that either clearly streamed, clearly bounced, or were ambiguous, and heard a sound around the point of contact (POC). They reported, on each trial, whether they perceived the disks to 'stream' or 'bounce', and whether the sound was 'synchronous' or 'asynchronous' with the POC. Results showed that the optimal time of the sound to induce a bounce was before the POC (-59 msec), whereas audiovisual synchrony was maximal when the sound came after the POC (+16 msec). The range of temporal asynchronies perceived as 'synchronous', the temporal binding window (TBW), was wider when disks were perceived as bouncing than streaming, with no difference between ambiguous and non-ambiguous visual displays. These results demonstrate 1) that causality differs from synchrony, 2) that causality widens the TBW, and 3) that the ABE is perceptually real.
声音可以使 2 个视觉流对象看起来发生反弹（视听反弹诱导效应，ABE）。在这里，我们研究了流/反弹感知是否会影响视听同步感知。参与者看到 2 个圆盘，它们要么清晰地流动，要么清晰地反弹，要么存在歧义，并且在接触点（POC）周围听到声音。在每次试验中，他们报告说，他们是否感知到圆盘在“流动”或“反弹”，以及声音与 POC 是否同步或异步。结果表明，声音诱导反弹的最佳时间是在 POC 之前（-59 毫秒），而当声音出现在 POC 之后（+16 毫秒）时，视听同步性最大。当圆盘被感知为反弹时，感知为“同步”的时间异步范围（TBW）更宽，而当圆盘被感知为流动时则更窄，在视觉显示的歧义与非歧义之间没有差异。这些结果表明 1）因果关系不同于同步性，2）因果关系扩大了 TBW，3）ABE 在知觉上是真实的。
