A Psychophysical Study on Temporal Interactions between Visual Features

Kazuhiro KANAHAMA  Osamu WATANABE 

Publication
D - Abstracts of IEICE TRANSACTIONS on Information and Systems (Japanese Edition)  Vol.J93-D  No.9  pp.1799-1802
Publication Date: 2010/09/01
Online ISSN: 1881-0225
Print ISSN: 1880-4535
Type of Manuscript: LETTER
Category: 
Keyword: 
visual feature,  perceptual asynchrony,  latency, 

Full Text(in Japanese): PDF(134.9KB)

Summary: 
Recently, computational studies of early vision have been highly developed, and the neural representation and algorithms of human visual system are investigated with various experimental studies. There have been many psychophysical studies revealing static properties (i.e., thresholds, precision, etc.) of visual perception. However, little is known about the dynamic (or temporal) properties of visual system. Moutoussis and Zeki (1997) examined the perceptual asynchrony between color and motion perceptions and reported motion perception lagged color perception by 80-100 ms. It is expected that the temporal aspect of visual perception provides an important cue to reveal the neural mechanisms of early vision, because that would reflect the complexity of visual computations and the property of feature binding mechanism. Here, we examined the perceptual asynchrony between three visual features, i.e., color, motion, and binocular disparity, and showed that the perceptual latencies of each feature were modulated according as what feature was combined with. This result suggests that there are temporal interactions between visual modules.