In the current study, we measured the McGurk-MMN for normal
and Thatcherized faces with either upright or inverted orientation. We
used the congruent audiovisual syllable /ba/ as the standard stimulus
and the incongruent audiovisual combination of acoustic /ba/ þvisual
/va/ as deviant stimulus as these were the phonemes for which
Rosenblum et al. (2000) found the effect to be the strongest. To ensure
that the McThatcher effect occurs for these specific stimuli, we also
replicate Rosenblum et al.'s behavioral paradigm. Our hypothesis is
that the McGurk-MMN will mirror behavioral findings and confirm
the effect as being a truly perceptual effect. As the amplitude of the
MMN is known to increase with perceived stimulus difference
(Garrido et al., 2009; May and Tiitinen, 2010; Näätänen et al., 1978,
2004) we expect MMN amplitudes to be correlated with levels of
behavioral McGurk responses.
In the current study, we measured the McGurk-MMN for normaland Thatcherized faces with either upright or inverted orientation. Weused the congruent audiovisual syllable /ba/ as the standard stimulusand the incongruent audiovisual combination of acoustic /ba/ þvisual/va/ as deviant stimulus as these were the phonemes for whichRosenblum et al. (2000) found the effect to be the strongest. To ensurethat the McThatcher effect occurs for these specific stimuli, we alsoreplicate Rosenblum et al.'s behavioral paradigm. Our hypothesis isthat the McGurk-MMN will mirror behavioral findings and confirmthe effect as being a truly perceptual effect. As the amplitude of theMMN is known to increase with perceived stimulus difference(Garrido et al., 2009; May and Tiitinen, 2010; Näätänen et al., 1978,2004) we expect MMN amplitudes to be correlated with levels ofbehavioral McGurk responses.
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