Auditory-Visual Speech Processing
(AVSP 2001)

September 7-9, 2001
Aalborg, Denmark

The Mismatch Negativity (MMN) and the McGurk Effect

C. Colin (1,2), M. Radeau (1,3), P. Deltenre (1,2)

(1) Research Unit in Cognitive Neurosciences, Université Libre de Bruxelles. Belgium
(2) Evoked Potentials Laboratory, Brugmann Hospital, Université Libre de Bruxelles, Belgium
(3) FNRS, Belgium

The McGurk illusory percept is obtained by dubbing an incongruent articulatory movement onto an auditory signal. The Mismatch Negativity (MMN) of the auditory Event-Related Potential (ERP) reflects the detection of a deviant stimulus within auditory short-term memory (STM) and besides an acoustic component, possesses, under certain conditions, a phonetic one. The present study assessed the existence of an MMN evoked by McGurk percepts. Three experimental conditions were investigated: auditory alone, visual alone and audiovisual (all with the same auditory components). The auditory deviant syllables and the audiovisual incongruent syllables elicited a significant MMN. In the visual condition, no negativity was observed. An MMN can be evoked by audiovisual stimuli that are deviant by their visual content only, provided they are presented in a suitable auditory context leading to a phonetically significant interaction.

Full Paper

Bibliographic reference.  Colin, C. / Radeau, M. / Deltenre, P. (2001): "The mismatch negativity (MMN) and the McGurk effect", In AVSP-2001, 56-61.