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Altering the primacy bias—How does a prior task affect mismatch negativity?


Mullens, D and Woodley, J and Whitson, L and Provost, A and Heathcote, A and Winkler, I and Todd, J, Altering the primacy bias How does a prior task affect mismatch negativity?, Psychophysiology: An International Journal, 51 pp. 437-445. ISSN 0048-5772 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Society for Psychophysiological Research

DOI: doi:10.1111/psyp.12190


The role in which two tones are first encountered in an unattended oddball sequence affects how deviance detection, reflected by mismatch negativity, treats them later when the roles reverse: a "primacy bias."We tested whether this effect is modulated by previous behavioral relevance assigned to the two tones. To this end, sequences in which the roles of the two tones alternated were preceded by a go/no-go task in which tones were presented with equal probability. Half of the participants were asked to respond to the short sounds, the other half to long sounds. Primacy bias was initially abolished but returned dependent upon the go-stimulus that the participant was assigned. Results demonstrate a long-term impact of prior learning on deviance detection, and that even when prior importance/equivalence is learned, the bias ultimately returns. Results are discussed in terms of persistent go-stimulus specific changes in responsiveness to sound.

Item Details

Item Type:Refereed Article
Keywords:EEG/ERP, Mismatch negativity, Salience
Research Division:Psychology
Research Group:Cognitive and computational psychology
Research Field:Decision making
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in psychology
UTAS Author:Heathcote, A (Professor Andrew Heathcote)
ID Code:98934
Year Published:2014
Web of Science® Times Cited:19
Deposited By:Medicine
Deposited On:2015-03-10
Last Modified:2017-10-31

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