Sensory uncertainty governs the extent of audio-visual interaction
Sensory uncertainty governs the extent of audio-visual interaction
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DOI：
10.1016/j.visres.2004.07.001
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发表时间：
2004-11-01
期刊：
影响因子：
1.8
通讯作者：
McGraw, F
中科院分区：
文献类型：
--
作者：
Heron, J;Whitaker, D;McGraw, F
听觉信号已经被证明在广泛的任务中对视觉感知产生显著的影响。然而，这些相互作用的机制，目前，知之甚少。在这里，我们提出了一系列的实验，在听觉域的时间线索可以显着影响移动的视觉目标的定位。为了研究这种相互作用的机制，我们首先通过改变视觉目标的大小来调制视觉目标的空间位置不确定性。当视觉位置的不确定性低（小的目标尺寸），听觉信号有很少或没有影响感知的视觉位置。然而，随着视觉不确定性的增加（更大的目标尺寸），听觉信号对感知的视觉位置产生了显着更大的影响。然后，我们通过调制其高斯时间包络的扩展来改变听觉信号的时间轮廓。将这种时间上的不确定性引入听觉信号，大大降低了其对视觉定位判断的影响。这些发现支持了这样一种观点，即个体感觉域的相对不确定性决定了多感觉整合的感知结果。(C)2004爱思唯尔有限公司保留所有权利。
Auditory signals have been shown to exert a marked influence on visual perception in a wide range of tasks. However, the mechanisms of these interactions are, at present, poorly understood. Here we present a series of experiments where a temporal cue within the auditory domain can significantly affect the localisation of a moving visual target. To investigate the mechanism of this interaction, we first modulated the spatial positional uncertainty of the visual target by varying its size. When visual positional uncertainty was low (small target size), auditory signals had little or no influence on perceived visual location. However, with increasing visual uncertainty (larger target sizes), auditory signals exerted a significantly greater influence on perceived visual location. We then altered the temporal profile of the auditory signal by modulating the spread of its Gaussian temporal envelope. Introducing this temporal uncertainty to the auditory signal greatly reduced its effect on visual localisation judgements. These findings support the view that the relative uncertainty in individual sensory domains governs the perceptual outcome of multisensory integration. (C) 2004 Elsevier Ltd. All rights reserved.