呈示刺激数とその規則性が視覚探索課題遂行中の事象関連電位に及ぼす影響 <論説>

広島経済大学研究論集 22 巻 1 号 7-27 頁 1999-06-30 発行
アクセス数 : 858
ダウンロード数 : 543

今月のアクセス数 : 5
今月のダウンロード数 : 3
ファイル情報(添付)
タイトル ( jpn )
呈示刺激数とその規則性が視覚探索課題遂行中の事象関連電位に及ぼす影響 <論説>
タイトル ( eng )
Effects of display set size and its variability on the event-related potentials during a visual search task <Articles>
作成者
坂田 須美子
収録物名
広島経済大学研究論集
22
1
開始ページ 7
終了ページ 27
抄録
This study investigated the effects of display set size and its variability on the event-related potentials (ERPs) during a visual search task. In Experiment 1, subjects were required to respond if a visual display, which consisted of two, four, or six alphabets, contained one of two members of memory set. In Experiment 2, subjects detected the change of the shape of a fixation stimulus, which was surrounded by the same alphabets as in Experiment 1. In the search task (Experiment 1), the increase of display set size resulted in the negative shift of the ERPs between 320-640 ms after the stimulus onset. This negative shift (visual search negativity) was almost the same in amplitude over the whole scalp. The variability of the display set size also affected the ERPs between 280-400 ms, so that the ERPs were more negative when the display set size was constant, compared to when it changed randomly within an experimental block. This effect of variability did not interact with that of display set size, which suggested the search processes reflected in the visual search negativity were not affected by a visuo-spatial attention. In the non-search task (Experiment 2), the ERP changes caused by display set size were limited to the occipital and posterior temporal regions, smaller in amplitude, and later in latency than those in Experiment 1. These results suggested that the visual search negativity might be composed of several sub-components, which reflect the activity of sub-processes involved in visual search processes.
著者キーワード
visual search
display set size
event-related potentials (ERPs)
visual search negativity
NDC分類
心理学 [ 140 ]
言語
日本語
資源タイプ 紀要論文
出版者
広島経済大学経済学会
発行日 1999-06-30
権利情報
Copyright (c) 1999 Authors
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0387-1444
[NCID] AN00408380