Grove Philip M, Kawachi Yousuke, Kenzo Sakurai
School of Psychology, The University of Queensland, St Lucia, Queensland 4072, Australia.
Perception. 2012;41(4):379-88. doi: 10.1068/p6808.
We generalised the stream/bounce effect to dynamic random element displays containing luminance- or disparity-defined targets. Previous studies investigating audio-visual interactions in this context have exclusively employed motion sequences with luminance-defined disks or squares and have focused on properties of the accompanying brief stimuli rather than the visual properties of the motion targets. We found that the presence of a brief sound temporally close to coincidence, or a visual flash at coincidence significantly promote bounce perception for motion targets defined by either luminance contrast or disparity contrast. A brief tone significantly promoted bouncing of luminance-defined targets above a no-sound baseline when it was presented at least 250 ms before coincidence and 100 ms after coincidence. A similar pattern was observed for disparity-defined targets, though the tone promoted bouncing above the no-sound baseline when presented at least 350 ms before and 300 ms after coincidence. We further explored the temporal properties of audio-visual interactions for these two display types and found that bounce perception saturated at similar durations after coincidence. The stream/bounce illusion manifests itself in dynamic random-element displays and is similar for luminance- and disparity-defined motion targets.
我们将流/弹跳效应推广到包含亮度或视差定义目标的动态随机元素显示中。此前在这种背景下研究视听交互的研究仅采用了带有亮度定义圆盘或方块的运动序列，并且关注的是伴随的短暂刺激的特性，而非运动目标的视觉特性。我们发现，在时间上接近重合时出现的短暂声音，或在重合时出现的视觉闪光，会显著促进由亮度对比或视差对比定义的运动目标的弹跳感知。当一个短暂的音调在重合前至少250毫秒且在重合后100毫秒呈现时，它会显著促进亮度定义目标在无声基线之上的弹跳。对于视差定义目标也观察到了类似的模式，不过当音调在重合前至少350毫秒且在重合后300毫秒呈现时，它会促进在无声基线之上的弹跳。我们进一步探究了这两种显示类型的视听交互的时间特性，发现重合后在相似的持续时间内弹跳感知达到饱和。流/弹跳错觉在动态随机元素显示中表现出来，并且对于亮度和视差定义的运动目标是相似的。
