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The representation of unattended, segmented sounds: a mismatch negativity (MMN) study.
Int J Psychophysiol. 2011 Aug; 81(2):121-6.IJ

Abstract

The detection of an irregular, potentially relevant change (deviance) in the regular, unattended acoustic environment is ensured by the automatic deviance detection mechanism. It underlies the formation of a regularity representation and a comparison of an incoming sound with this representation. A mismatch outcome of this comparison evokes the mismatch negativity (MMN) of the event-related potential. For unattended pure tones the automatic deviance detection mechanism operates most efficiently for initial sound parts, which is why these are suggested to contribute more to sound representation than later parts. A transient that physically segments the sound can overcome this temporal constraint in sound representation. Whether the resulting individual (initial and terminal) sound segments or the joined two-segments give rise to the regularity representation is addressed here. We took advantage that the MMN attenuation to the second of two successive deviances (deviance-repetition effect) is more pronounced when the deviances belong to the same unit of representation. We measured MMN for two deviances (frequency modulations) within segmented sounds that either occurred within the initial or the terminal segment, or that were split across both segments. Unexpectedly, we did not obtain a deviance-repetition effect. Instead, we obtained a temporal distance effect: With increasing temporal distance from deviance-onset relative to segment-onset the MMN amplitude decreased. Furthermore, this effect did not depend on whether the deviance occurred in the initial or in the terminal segment. Thus, (for the current approach) we suggest that the regularity representation is based on the individual rather than joined segments.

Authors+Show Affiliations

Kognitive einschl. Biologische Psychologie, Institut für Psychologie, Universität Leipzig, Seeburgstr. 14-20, 04103 Leipzig, Germany. akweise@uni-leipzig.deNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21600937

Citation

Weise, Annekathrin, et al. "The Representation of Unattended, Segmented Sounds: a Mismatch Negativity (MMN) Study." International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology, vol. 81, no. 2, 2011, pp. 121-6.
Weise A, Ritter W, Schröger E. The representation of unattended, segmented sounds: a mismatch negativity (MMN) study. Int J Psychophysiol. 2011;81(2):121-6.
Weise, A., Ritter, W., & Schröger, E. (2011). The representation of unattended, segmented sounds: a mismatch negativity (MMN) study. International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology, 81(2), 121-6. https://doi.org/10.1016/j.ijpsycho.2011.05.001
Weise A, Ritter W, Schröger E. The Representation of Unattended, Segmented Sounds: a Mismatch Negativity (MMN) Study. Int J Psychophysiol. 2011;81(2):121-6. PubMed PMID: 21600937.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The representation of unattended, segmented sounds: a mismatch negativity (MMN) study. AU - Weise,Annekathrin, AU - Ritter,Walter, AU - Schröger,Erich, Y1 - 2011/05/19/ PY - 2011/02/01/received PY - 2011/04/07/revised PY - 2011/05/04/accepted PY - 2011/5/24/entrez PY - 2011/5/24/pubmed PY - 2011/12/13/medline SP - 121 EP - 6 JF - International journal of psychophysiology : official journal of the International Organization of Psychophysiology JO - Int J Psychophysiol VL - 81 IS - 2 N2 - The detection of an irregular, potentially relevant change (deviance) in the regular, unattended acoustic environment is ensured by the automatic deviance detection mechanism. It underlies the formation of a regularity representation and a comparison of an incoming sound with this representation. A mismatch outcome of this comparison evokes the mismatch negativity (MMN) of the event-related potential. For unattended pure tones the automatic deviance detection mechanism operates most efficiently for initial sound parts, which is why these are suggested to contribute more to sound representation than later parts. A transient that physically segments the sound can overcome this temporal constraint in sound representation. Whether the resulting individual (initial and terminal) sound segments or the joined two-segments give rise to the regularity representation is addressed here. We took advantage that the MMN attenuation to the second of two successive deviances (deviance-repetition effect) is more pronounced when the deviances belong to the same unit of representation. We measured MMN for two deviances (frequency modulations) within segmented sounds that either occurred within the initial or the terminal segment, or that were split across both segments. Unexpectedly, we did not obtain a deviance-repetition effect. Instead, we obtained a temporal distance effect: With increasing temporal distance from deviance-onset relative to segment-onset the MMN amplitude decreased. Furthermore, this effect did not depend on whether the deviance occurred in the initial or in the terminal segment. Thus, (for the current approach) we suggest that the regularity representation is based on the individual rather than joined segments. SN - 1872-7697 UR - https://www.unboundmedicine.com/medline/citation/21600937/The_representation_of_unattended_segmented_sounds:_a_mismatch_negativity__MMN__study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0167-8760(11)00150-4 DB - PRIME DP - Unbound Medicine ER -