Background: The integration of sound and visual information is an essential component of cognition.
It has been proved that sound and visual stimuli features play key roles in the audiovisual integration.With
regard to the color perception in visual stimuli, there are two cone pathways: a red-green and a blue-yellow at
the level of the retina and the lateral geniculate nucleus. However, the effects of two color pathways on the audiovisual
integration remain unclear.
Objective: This study focused on studying the effects of the red-green and blue-yellow pathway on audiovisual
Methods: In this study, unimodal visual (three visual conditions: black-white, blue-yellow and redgreen),
unimodal auditory, and bimodal audiovisual stimuli with three visual conditions were randomly
presented at a 12-degree visual angle to the left or right of the center. The participants were asked for
responding to the presented stimuli quickly and accurately. We used cumulative distribution functions
to analyze the response times as a measure of audiovisual integration. In addition, the pairwise differences
and t-tests were performed in cumulative distribution functions to compare the audiovisual integration
with different visual conditions.
Results: The statistical analysis results indicated that the facilitation of audiovisual integration in blackwhite
condition was significant larger than red-green in the early stage and blue-yellow in the later
stage. Additionally, the behavioral facilitation in red-green condition was significant larger than blueyellow
condition in the later stage.
Conclusion: These results suggested that the different color pathways affect both the behavioral facilitation
and time of audiovisual integration.