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Neural Processes Underlying the "Same" - "Different" Judgment of Two Simultaneously Presented Objects - An EEG Study

Zhang, R and Hu, Z and Roberson, D and Zhang, L and Li, H and Liu, Q (2013) 'Neural Processes Underlying the "Same" - "Different" Judgment of Two Simultaneously Presented Objects - An EEG Study.' PLoS ONE, 8 (12). creators-Roberson=3ADebi=3A=3A. ISSN 1932-6203

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The present study investigated the neural processes underlying ??same?? and -??different?? judgments for two simultaneously presented objects, that varied on one or both, of two dimensions: color and shape. Participants judged whether or not the two objects were ??same?? or ??different?? on either the color dimension (color task) or the shape dimension (shape task). The unattended irrelevant dimension of the objects was either congruent (same-same; different-different) or incongruent (samedifferent. ERP data showed a main effect of color congruency in the time window 190?260 ms post-stimulus presentation and a main effect of shape congruency in the time window 220?280 ms post-stimulus presentation in both color and shape tasks. The interaction between color and shape congruency in the ERP data occurred in a later time window than the two main effects, indicating that mismatches in task-relevant and task-irrelevant dimensions were processed automatically and independently before a response was selected. The fact that the interference of the task-irrelevant dimension occurred after mismatch detection, supports a confluence model of processing.

Item Type: Article
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 15 May 2014 10:03
Last Modified: 15 Jan 2022 01:04

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