Di Luca Massimiliano, Machulla Tonja-Katrin, Ernst Marc O
Max Planck Institute for Biological Cybernetics, Tübingen, Germany.
J Vis. 2009 Nov 13;9(12):7.1-16. doi: 10.1167/9.12.7.
After exposure to asynchronous sound and light stimuli, perceived audio-visual synchrony changes to compensate for the asynchrony. Here we investigate to what extent this audio-visual recalibration effect transfers to visual-tactile and audio-tactile simultaneity perception in order to infer the mechanisms responsible for temporal recalibration. Results indicate that audio-visual recalibration of simultaneity can transfer to audio-tactile and visual-tactile stimuli depending on the way in which the multisensory stimuli are presented. With presentation of co-located multisensory stimuli, we found a change in the perceptual latency of the visual stimuli. Presenting auditory stimuli through headphones, on the other hand, induced a change in the perceptual latency of the auditory stimuli. We argue that the difference in transfer depends on the relative trust in the auditory and visual estimates. Interestingly, these findings were confirmed by showing that audio-visual recalibration influences simple reaction time to visual and auditory stimuli. Presenting co-located stimuli during asynchronous exposure induced a change in reaction time to visual stimuli, while with headphones the change in reaction time occurred for the auditory stimuli. These results indicate that the perceptual latency is altered with repeated exposure to asynchronous audio-visual stimuli in order to compensate (at least in part) for the presented asynchrony.
在暴露于异步声光刺激后，感知到的视听同步性会发生变化以补偿异步性。在此，我们研究这种视听重新校准效应在多大程度上转移到视觉 - 触觉和听觉 - 触觉同时性感知，以便推断负责时间重新校准的机制。结果表明，同时性的视听重新校准可以根据多感官刺激的呈现方式转移到听觉 - 触觉和视觉 - 触觉刺激。对于共定位的多感官刺激的呈现，我们发现视觉刺激的感知潜伏期发生了变化。另一方面，通过耳机呈现听觉刺激会导致听觉刺激的感知潜伏期发生变化。我们认为转移的差异取决于对听觉和视觉估计的相对信任度。有趣的是，通过表明视听重新校准会影响对视觉和听觉刺激的简单反应时间，这些发现得到了证实。在异步暴露期间呈现共定位刺激会导致对视觉刺激的反应时间发生变化，而使用耳机时，反应时间的变化则发生在听觉刺激上。这些结果表明，反复暴露于异步视听刺激会改变感知潜伏期，以便（至少部分地）补偿所呈现的异步性。
