Audiovisual congruency and incongruency effects on auditory intensity discrimination. (1st January 2015) - Guo, Xiaoli
Highlights: We use a S1–S2 matching paradigm to investigate audiovisual interaction. We examine behavior and event-related potential difference waves. We find significant audiovisual congruency and incongruency effects. Change of visual size affects auditory intensity discrimination. Abstract: This study used a S1–S2 matching paradigm to investigate the influences of visual (size) change on auditory intensity discrimination. Behavioral results showed that subjects made more errors and spent more time to discriminate change in auditory intensity when it was accompanied by an incongruent visual change, while the performance for congruent audiovisual stimuli was better especially if there is a change in auditory stimuli. Event-related potential difference waves revealed that audiovisual interactions for multimodal mismatched information processing activated the right frontal and left centro-parietal cortices around 300–400 ms post S1-onset.