The process of spatial frequency information in temporal synchrony perception for audiovisual stimuli

Abstract

Abstract Previous studies have shown that spatial frequency (SF) of visual stimuli alters the perceived timing of subjective simultaneity. However, these studies have been limited to the effects of a single SF component. This study measured and compared the points of subjective simultaneity (PSS) for audiovisual stimuli among low, high, and composited SF components. This experiment utilized a dual-presentation timing task and a ternary response format to eliminate response bias for simultaneity judgment. The results indicated that the PSS value of the composition-SF stimuli was medium between that of the low- and high-SF stimuli. The correlation coefficients showed that the PSS in composition-SF stimuli approximated that of high-SF stimuli higher than that of low-SF stimuli. Furthermore, this study more directly indicated that the difference of processing speed with SF modulated PSS values. Future studies are needed to confirm these findings via visual stimuli with a wider range of SF components.