Tactile Capture of Auditory Localization Is Modulated by Hand Posture
Tactile Capture of Auditory Localization Is Modulated by Hand Posture
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DOI：
10.1027/1618-3169/a000032
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发表时间：
2010-01-01
影响因子：
1.3
通讯作者：
Roeder, Brigitte
中科院分区：
文献类型：
--
作者：
Bruns, Patrick;Roeder, Brigitte
众所周知，同步的听觉和视觉事件之间的空间差异会导致听觉刺激向视觉刺激的错误定位，即所谓的腹语效应。最近，有报道称触摸对试镜也有类似的影响。这项研究调查了这种听觉-触觉腹语效应是否依赖于手势。参与者报告了从左侧、右侧和中心位置呈现的短暂听觉刺激的感知位置，无论是单独呈现还是与位于扬声器阵列左侧和右侧的指尖的同时触觉刺激一起呈现。与单峰呈现相比，在双峰试验中，听觉定位偏向于同时触觉刺激的一侧。当参与者采取双手交叉的姿势时，这种影响会减少，但仍然很显著。在这种情况下，只有在较大的听觉-触觉空间差异时才能观察到局部(不完全)的定位偏差。然而，定位仍然向触觉刺激的外部位置移动，而不是向被刺激的解剖手的一侧移动。这些结果证实了最近关于听觉-触觉口技效应存在的证据，并通过证明这种错觉主要在外部坐标系中运行来扩展这些发现。
It is well known that spatial discrepancies between synchronized auditory and visual events can lead to mislocalizations of the auditory stimulus toward the visual stimulus, the so-called ventriloquism effect. Recently, a similar effect of touch on audition has been reported. This study investigated whether this audio-tactile ventriloquism effect depends on hand posture. Participants reported the perceived location of brief auditory stimuli that were presented from left, right, and center locations, either alone or with concurrent tactile stimuli to the fingertips situated at the left and right sides of the speaker array. Compared to unimodal presentations, auditory localization was biased toward the side of the concurrent tactile stimulus in the bimodal trials. This effect was reduced but still significant when participants adopted a crossed-hands posture. In this condition a partial (incomplete) localization bias was observed only for large audio-tactile spatial discrepancies. However, localization was still shifted toward the external location of the tactile stimulus, and not toward the side of the anatomical hand that was stimulated. These results substantiate recent evidence for the existence of an audio-tactile ventriloquism effect and extend these findings by demonstrating that this illusion operates predominantly in an external coordinate system.