AUDIOVISUAL GATING AND THE TIME-COURSE OF SPEECH-PERCEPTION

The time course of audiovisual information in speech perception was ex amined using a gating paradigm. VCVs that evoked the McGurk effect wer e gated visually and auditorily. The visual gating yielded a McGurk ef fect that increased in strength as a linear function of amount of visu al stimulus presented. The acoustic gating revealed a more nonlinear f unction in which the VC information was considerably weaker than the C V portion of the VCV. The results suggest that the flow of cross-modal information is quite complex during audiovisual speech perception. (C ) 1998 Acoustical Society of America.