Direction of visual apparent motion driven solely by timing of a static sound.

Direction of visual apparent motion driven solely by timing of a static sound.
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DOI:
10.1016/j.cub.2008.07.066
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发表时间:
2008-08-26
期刊:
影响因子:
9.2
通讯作者:
Driver, Jon
Driver, Jon
中科院分区:
生物学1区
文献类型:
--
作者:
Freeman, Elliot;Driver, Jon

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在时间型腹语症中,听觉事件可以虚幻地吸引视觉事件发生的感知时间。我们研究了静态声音的时间是否也会影响视觉表观运动的时空加工,在这里,视觉条在相对的半场之间交替。感知方向通常取决于视觉左-右和右-左闪烁之间的相对时间间隔(例如,当左-右闪烁间隔最短时,向右运动占主导地位)。在我们新的多感官条件下,闪光之间的间隔是相等的,但听觉蜂鸣声可能稍微滞后于右侧闪光,但稍微领先于左侧闪光,反之亦然。尽管没有提供任何空间听觉运动信号,但这种听觉计时强烈地影响了感知到的视觉运动方向。此外,当在随后的沉默中测量时,对这种听觉驱动的表观运动的长时间适应在相反方向上产生了强大的视觉运动后效。对照实验在可能的听觉分组或可能的注意力捕获方面反驳了这种说法。我们认为,运动的产生是因为声音改变了感知到的视觉时间,正如我们分别证实的那样。我们的研究结果为感官特异性知觉的多感官影响提供了新的证明,静态声音的时间影响视觉运动方向的时空加工。
In temporal ventriloquism, auditory events can illusorily attract perceived timing of a visual onset. We investigated whether timing of a static sound can also influence spatio-temporal processing of visual apparent motion, induced here by visual bars alternating between opposite hemifields. Perceived direction typically depends on the relative interval in timing between visual left-right and right-left flashes (e.g. rightwards motion dominating when left-to-right inter-flash intervals are shortest). In our new multisensory condition, inter-flash intervals were equal, but auditory beeps could slightly lag the right flash, yet slightly lead the left flash, or vice-versa. This auditory timing strongly influenced perceived visual motion direction, despite providing no spatial auditory motion signal whatsoever. Moreover, prolonged adaptation to such auditorily-driven apparent motion produced a robust visual motion aftereffect in the opposite direction, when measured in subsequent silence. Control experiments argued against accounts in terms of possible auditory grouping, or possible attention capture. We suggest that the motion arises because the sounds change perceived visual timing, as we separately confirmed. Our results provide a new demonstration of multisensory influences on sensory-specific perception, with timing of a static sound influencing spatio-temporal processing of visual motion direction.
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