Mismatch negativity (MMN) and the scale illusion: an electroencephalography (EEG) study

[Speaker] Ono, Kentaro:1
[Co-author] Altmann, Christian F:1
1:Kyoto University (Japan)

Mismatch negativity (MMN) can be elicited by any discriminable change of features in a tone sequence. The MMN is believed to occur as a result of comparison between the memory trace of previous tones and an incoming tone. In this study, we investigated whether the memory trace is created by physical properties or perceived representation of a tone sequence, using a tone sequence that produces illusionary perception of ascending/descending scale, known as "scale illusion". The order of presentation to the left and right ears was infrequently changed, used as a deviant. Dichotically presented ascending/descending scale, as a control, showed MMN in response to the deviant, while the illusion sequence did not show MMN. These results suggest that the occurrence of MMN is based on the representation of tones based on the perception, but not on the physical properties of a tone sequence.
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