Bayesian inference explains perception of unity and ventriloquism aftereffect: Identification of common sources of audiovisual stimuli
Bayesian inference explains perception of unity and ventriloquism aftereffect: Identification of common sources of audiovisual stimuli
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DOI：
10.1162/neco.2007.19.12.3335
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发表时间：
2007-12-01
影响因子：
2.9
通讯作者：
Aihara, Kazuyuki
中科院分区：
文献类型：
--
作者：
Sato, Yoshiyuki;Toyoizumi, Taro;Aihara, Kazuyuki
我们研究了一个视听整合的计算模型，通过设置一个贝叶斯观察者来定位视觉和听觉刺激，而不假设视听信息的绑定。观察者采用最大后验方法来估计所呈现刺激的物理传递位置或时间，同时判断它们是否来自同一来源。如果将实验对象视为试图准确定位刺激的贝叶斯观察者，则可以全面解释空间统一性感知和腹语效应的几个实验结果。此外，通过根据经验自适应地改变贝叶斯观察者的内部表征，我们表明我们的模型再现了由于被称为腹语后效的视听适应而感知到的空间框架变化。
We study a computational model of audiovisual integration by setting a Bayesian observer that localizes visual and auditory stimuli without presuming the binding of audiovisual information. The observer adopts the maximum a posteriori approach to estimate the physically delivered position or timing of presented stimuli, simultaneously judging whether they are from the same source or not. Several experimental results on the perception of spatial unity and the ventriloquism effect can be explained comprehensively if the subjects in the experiments are regarded as Bayesian observers who try to accurately locate the stimulus. Moreover, by adaptively changing the inner representation of the Bayesian observer in terms of experience, we show that our model reproduces perceived spatial frame shifts due to the audiovisual adaptation known as the ventriloquism aftereffect.