Soochow University, China.
Changchun University of Chinese Medicine, China.
Perception. 2021 Jun;50(6):489-507. doi: 10.1177/03010066211018614. Epub 2021 May 26.
Sound-induced flash illusion (SiFI) refers to the illusion that the number of visual flashes is equal to the number of auditory sounds when the visual flashes are accompanied by an unequal number of auditory sounds presented within 100 ms. The effect of repetition suppression (RS), an adaptive effect caused by stimulus repetition, upon the SiFI has not been investigated. Based on the classic SiFI paradigm, the present study investigated whether RS would affect the SiFI differently by adding preceding stimuli in visual and auditory modalities prior to the appearance of audiovisual stimuli. The results showed the auditory RS effect on the SiFI varied with the number of preceding auditory stimuli. The hit rate was higher with two preceding auditory stimuli than one preceding auditory stimulus in fission illusion, but it did not affect the size of the fusion illusion. However, the visual RS had no effect on the size of the fission and fusion illusions. The present study suggested that RS could affect the SiFI, indicating that the RS effect in different modalities would differentially affect the magnitude of the SiFI. In the process of multisensory integration, the visual and auditory modalities had asymmetrical RS effects.
声诱闪光错觉（SiFI）是指当视觉闪光伴随着在 100ms 内呈现的不等数量的听觉声音时，视觉闪光的数量与听觉声音的数量相等的错觉。重复抑制（RS）的影响，即由刺激重复引起的适应性效应，尚未被研究过。基于经典的 SiFI 范式，本研究通过在视听刺激出现之前在视觉和听觉模态中添加前置刺激，来探究 RS 是否会以不同的方式影响 SiFI。结果表明，听觉 RS 对 SiFI 的影响随前置听觉刺激的数量而变化。在裂变错觉中，两个前置听觉刺激比一个前置听觉刺激的命中率更高，但它不影响融合错觉的大小。然而，视觉 RS 对裂变和融合错觉的大小没有影响。本研究表明，RS 可以影响 SiFI，表明不同模态中的 RS 效应会对 SiFI 的大小产生不同的影响。在多感觉整合过程中，视觉和听觉模态具有不对称的 RS 效应。
