Event-related potential correlates of individual differences in working memory capacity

Hiroshi Nittono*, Yasuhiro Nageishi, Yoshiaki Nakajima, Peter Ullsperger

*この研究の対応する著者

    研究成果: Article査読

    34 被引用数 (Scopus)

    抄録

    The capacity of working memory has been suggested to differ among people and these differences affect performance in a wide variety of cognitive tasks. This study explored electrophysiological correlates of individual differences in working memory capacity by means of event-related potentials. Thirty-four healthy students performed two- and five-choice reaction time tasks. In the two-choice reaction time (2CRT) task, two digits (3 and 7) were presented visually with probabilities of .20 and .80. In the five-choice reaction time (5CRT) task, five digits (3, 4, 5, 6, and 7) were presented equiprobably in a random order. Participants were required to press a button corresponding to each digit with a different finger. Working memory capacity of each participant was assessed by the reading span test originated by M. Daneman and P.A. Carpenter (1980). Participants with high reading span produced larger P300s than did persons with low reading span in the 5CRT task, but the difference was not significant in the 2CRT task. It had been suggested that individual differences in working memory capacity would affect initial stages of information processing as early as 300 ms after stimulus onset.

    本文言語English
    ページ(範囲)745-754
    ページ数10
    ジャーナルPsychophysiology
    36
    6
    DOI
    出版ステータスPublished - 1999 11

    ASJC Scopus subject areas

    • 生理学
    • 生理学(医学)
    • 心理学(全般)
    • 神経心理学および生理心理学
    • 実験心理学および認知心理学

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