Abstract
Emotional prosody differentiates neutral sound at emotional category and acoustic features. To investigate the neural mechanism of early emotion perception in speech, one approach is using spectrally rotated sound of emotional sound as a neutral stimulus to match acoustic features. However, rotating sound involves the change of intelligence of the sound. Here the current event-related potential (ERP) study tested whether the mismatch negativity (MMN) invoked by the emotion stimuli reflects the emotion perception or change salience in oddball paradigm. Results revealed both emotion and rotation of the sound invoked MMNs, and larger negativity was found for rotated than emotional sounds. It suggested the perceived salience of change may determine the mismatch effects in implicit speech perception, and revealed that MMN effect in the early stage of emotion prosody perception can be explained in the domain-general change detection.
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