Abstract
The size perception is one of important capabilities for us in daily life. Therefore, many studies on size perception have been conducted, while most of them have focused on visual modality. It has been reported that we can discriminate the difference of object length by only sound and easily tend to match object size with loudness. In this study, we conducted whether perceived visual size altered by presenting auditory stimuli simultaneously. The results indicated that the size of visual object was perceived as larger when the synchronous louder sound was presented. Moreover, it was suggested that this audio-visual interaction had a temporal window similar to that was reported in the previous studies and the interaction occurred depending on the modal information reliabilities defined by the retinal eccentricity or the sound intensity.
