Automatic visual bias of perceived auditory location
Automatic visual bias of perceived auditory location
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DOI：
10.3758/bf03208826
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发表时间：
1998-09-01
影响因子：
3.5
通讯作者：
Aschersleben, G
中科院分区：
文献类型：
--
作者：
Bertelson, P;Aschersleben, G
对视听空间冲突的反应(别名“腹语”)的研究通常被认为是关于通道间协调过程的信息。然而，大多数文献未能将真正的知觉效应与自愿的知觉后调整分开。一种基于心理物理阶梯的新方法被应用于听觉定位的即刻视觉偏差的情况。受试者必须判断立体声控制的声音爆发的明显来源是中值参考线的左边还是右边。连续的审判属于两个阶梯中的一个，分别从最左边开始。和正确的位置，并根据受试者的反应逐步向中位数移动。当中央灯与闪光同步闪光时，远离中心的位置会发生反应反转(实验1)，这表明声音对闪光的吸引。由于反应反转的发生意味着被试对目标声音的方向不确定，因此这种效应不可能起源于自愿的知觉后决定。这种吸引力取决于声音-闪光同步，因为当两个通道的输入去同步时，早期反应逆转不再发生(实验2)。综上所述，结果表明，在较不受控制的条件下重复观察到的听觉定位的视觉偏差至少部分是由于空间上不协调但时间上相关的视觉输入自动吸引声音的表观位置。
Studies of reactions to audiovisual spatial conflict (alias "ventriloquism") are generally presented as informing on the processes of intermodal coordination. However, most of the literature has failed to isolate genuine perceptual effects from voluntary postperceptual adjustments. A new approach, based on psychophysical staircases, is applied to the case of the immediate visual bias of auditory localization. Subjects have to judge the apparent origin of stereophonically controlled sound bursts as left or right of a median reference line. Successive trials belong to one of two staircases, starting respectively at extreme left. and right locations, and are moved progressively toward the median on the basis of the subjects' responses. Response reversals occur for locations farther away from center when a central lamp is flashed in synchrony with the bursts than without flashes (Experiment 1), revealing an attraction of the sounds toward the flashes. The effect cannot originate in voluntary postperceptual decision, since the occurrence of response reversal implies that the subject is uncertain concerning the direction of the target sound. The attraction is contingent on sound-flash synchronization, for early response reversals did no longer occur when the inputs from the two modalities were desynchronized (Experiment 2). Taken together, the results show that the visual bias of auditory localization observed repeatedly in less controlled conditions is due partly at least to an automatic attraction of the apparent location of sound by spatially discordant but temporally correlated visual inputs.