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Fast multi-feature paradigm for recording several mismatch negativities (MMNs) to phonetic and acoustic changes in
Satu Pakarinen1, Riikka Lovio, Minna Huotilainen
1Cognitive Brain Research Unit, University of Helsinki, Helsinki, Finland; Helsinki Brain Research Centre, Helsinki, Finland. satu.pakarinen@helsinki.fi
Abstract:
In this study, we addressed whether a new fast multi-feature mismatch negativity (MMN) paradigm can be used for determining the central auditory discrimination accuracy for several acoustic and phonetic changes in speech sounds. We recorded the MMNs in the multi-feature paradigm to changes in syllable intensity, frequency, and vowel length, as well as for consonant and vowel change, and compared these MMNs to those obtained with the traditional oddball paradigm. In addition, we examined the reliability of the multi-feature paradigm by repeating the recordings with the same subjects 1-7 days after the first recordings. The MMNs recorded with the multi-feature paradigm were similar to those obtained with the oddball paradigm. Furthermore, only minor differences were observed in the MMN amplitudes across the two recording sessions. Thus, this new multi-feature paradigm with speech stimuli provides similar results as the oddball paradigm, and the MMNs recorded with the new paradigm were reproducible.
