Spatial property of visual mental imagery representation : Evidence from ERP P3(<Special Issue>Psychophysiological Studies)

概要

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To investigate if the reaction time effect from an imagery task was due to behavioral control by tacit knowledge, we estimated ERP P3, the peak latency of which reflects stimulus classification speed. Participants visualized the uppercase letter on grids corresponding to a lowercase letter beneath them, and pressed a button only for the infrequent target trials, in which an "X" probe mark in any cell fell on the visualized letter. Half of these target trials were labeled "early" because the probe placed on a segment drawn early in the order to be drawn, and the other half were "late". Not only RT, but P3 latency were modulated by the required stimulus classification speed for the corresponding imagery representation. The result indicates that reaction time for the imagery task reflects cognitive decision based on the spatial property of imagery representation.
バイオメディカル・ファジィ・システム学会の論文