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Related Experiment Video

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A Method to Study Adaptation to Left-Right Reversed Audition

A Method to Study Adaptation to Left-Right Reversed Audition

Published on: October 29, 2018

Mismatch negativity (MMN) to successive deviants within one hierarchically structured auditory object.

Thomas Konstantin Jacobsen¹, Johanna Steinberg, Hubert Truckenbrodt

¹Experimental Psychology Unit, Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany. jacobstk@hsu-hh.de

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology

|October 9, 2012

Summary

This study investigated auditory object processing using Mismatch Negativity (MMN). Findings suggest the second phonemic change in a complex auditory stimulus elicits an MMN, potentially enhanced by predictability.

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Area of Science:

Auditory Neuroscience
Cognitive Neuroscience
Psycholinguistics

Background:

Mismatch Negativity (MMN) is an event-related potential (ERP) reflecting auditory change detection.
Hierarchically organized auditory objects, like VC syllables, involve sequential phonemic information.

Purpose of the Study:

To determine if successive phonemic changes within a complex auditory object elicit separate MMN responses.
To investigate the neural processing of sequential phonetic changes in auditory perception.

Main Methods:

Passive oddball paradigm using VC syllables ([ɔx], [ɛʃ]) as standards and deviants.
Analysis of deviant-minus-standard difference waves to identify ERP components.
Statistical comparison with previous studies using simpler phonetic deviances.

Main Results:

Two negative deflections were observed in the difference waves.
The early component (108ms) was identified as N1 modulation; the later component (168ms) as MMN.
The MMN primarily reflected the change in the initial vowel, not both phonemes.
Higher MMN amplitudes for [ɛʃ] compared to prior studies suggested potential anticipatory enhancement.

Conclusions:

Sequential phonetic changes in complex auditory objects do not elicit distinct MMNs.
The MMN response is mainly sensitive to the initial vowel change in this context.
Predictability of a second phonetic change may enhance MMN amplitude, indicating anticipatory processing.