title: Neural processes underlying the"same"-"different" judgment of two simultaneously presented objects--an EEG study.
abstract: 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 (same-different). 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.
authors.affiliation: School of Psychology, Liaoning Normal University, Dalian, China.
authors.forename: Ruiling
authors.initials: R
authors.lastname: Zhang
authors.affiliation: School of Psychology, Liaoning Normal University, Dalian, China.
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Hu
authors.forename: Debi
authors.initials: D
authors.lastname: Roberson
authors.affiliation: Department of Psychology, University of Essex, Wivenhoe Park, Colchester, Essex, United Kingdom.
authors.forename: Roberson
authors.initials: R
authors.lastname: Debi
authors.affiliation: Department of Educational Science and Technology, Minnan Normal University Zhangzhou, China.
authors.forename: Lingcong
authors.initials: L
authors.lastname: Zhang
authors.affiliation: School of Psychology, Liaoning Normal University, Dalian, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Psychology, Liaoning Normal University, Dalian, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
mesh_terms: D001288:Attention; D003118:Color Perception / Q000502:physiology; D004192:Discrimination, Psychological; D004569:Electroencephalography; D005260:Female; D006801:Humans; D007600:Judgment / Q000502:physiology*; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D011930:Reaction Time; D013028:Space Perception / Q000502:physiology; D057190:Stroop Test; D055815:Young Adult