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A Psychophysiological Study on the role of working memory in a visual search

Research Project

Project/Area Number 11610080
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 実験系心理学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

MIYATANI Makoto  Hiroshima University, Graduate School of Education, Associate Professor, 大学院・教育学研究科, 助教授 (90200188)

Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1999: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordsworking memory / visual search / memory search / ERP / phonological loop / visual working memory / spatial working memory / 形のワーキングメモリ / 視覚性ワーキングメモリ
Research Abstract

We recorded the event-related potentials (ERPs) in the visual search, memory search, and mental rotation tasks, and observed a number of ERP changes, which reflected the processing of verbal, visual, and spatial information in a working memory. (1) The increase of visual items to be processed in a letter search task caused the increase of at lease two kinds of negativities, which can be differentiated by latency, topography, and sensitivity to how a target stimulus was designated. (2) In a delayed matching to sample task, the visual ERPs to the physically same stimulus differently influenced by memory load, depending on the kind of information (color, shape, or location) held in S1-S2 interval. (3) A concurrent mental arithmetic task selectively affected the amplitude and topography of the ERPs sensitive to memory load in the visual/memory search task. The ERP changes due to display load were not affected by this concurrent task. (4) Rehearsal of nonsense syllable performed concurrently with memory search task caused the decrease of N1 amplitude and the memory load effect of ERPs to auditory words, but did not affect ERPs to visual words or visual images. (5) The negative enhancement of ERPs due to stimulus angle in a mental rotation task was affected by a concurrent memory task for nonsense shapes, but not by memory for nonsense syllables. These suggest that the temporal and spatial patterns of ERPs can be indices of the operations of subsystems (verbal, visual, and spatial) in a working memory, and that the dual task approach is a useful method for disentangling the overlapping components, for inferring association between these electrophysiological measures and the processes involved in a working memory, and for estimating the roles and functional organization of multiple subsystems of working memory in various cognitive tasks.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 宮谷真人: "事象関連電位による色の記憶探索過程に関する研究"広島大学心理学研究. 1. 1-9 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 宮谷真人: "基準電極の違いが事象関連電位に及ぼす影響"広島大学大学院教育学研究科紀要(第三部). 50. 301-308 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyatani, Makoto: "An event-related potential study on memory search for color"Hiroshima Psychological Research. 1. 1-9 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miyatani, Makoto: "Differences of event-related potentials with use of different reference sites"Bulletin of the Graduate School of Education, Hiroshima University (Part3). 50. 301-308 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 宮谷 真人: "事象関連電位による色の記憶探索過程に関する研究"広島大学心理学研究. 1. 1-9 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 宮谷 真人: "基準電極の違いが事象関連電位に及ぼす影響"広島大学大学院教育学研究科紀要(第三部). 50. 301-308 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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