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2023 Fiscal Year Final Research Report

Human-rat comparative examinations on representational momentum as anticipatory visual perception

Research Project

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Project/Area Number 21K18562
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 10:Psychology and related fields
Research InstitutionTokyo Metropolitan University

Principal Investigator

Imanaka Kuniyasu  東京都立大学, 人間健康科学研究科, 客員教授 (90100891)

Co-Investigator(Kenkyū-buntansha) 北 一郎  東京都立大学, 人間健康科学研究科, 教授 (10186223)
雨宮 誠一朗  国立研究開発法人理化学研究所, 脳神経科学研究センター, 研究員 (20796015)
Project Period (FY) 2021-07-09 – 2024-03-31
Keywords比較認知行動科学 / 表象的慣性 / 視覚的予測 / ヒト / ラット
Outline of Final Research Achievements

This study compared humans and rats, using identical experimental procedures, on the representational momentum (RM), known as an anticipatory visual behavioral function in which the memory representation of vanishing point of a moving object tends to be displaced forward in the direction of its motion. In our experiments, a visual stimulus moved horizontally on a touch-screen display, followed by stationary presentation of it for 500 or 1000 ms, then vanished. Both human and rat participants were asked (trained) to touch the perceived vanishing point of the stimulus after its vanishing. Seven out of 14 rats successfully performed the touch tasks with significantly larger positive errors appearing in 500 ms than 1000 ms conditions, resulting in a significant RM. Human participants significantly replicated the larger positive touch errors in 500 ms than in 1000 ms, indicating a significant RM. Our findings showed that RM could exist in both humans and rats with similar characteristics.

Free Research Field

知覚と行為

Academic Significance and Societal Importance of the Research Achievements

予測的視覚機能としての表象的慣性RMは、その知覚特性、熟練者特性、発育発達特性などの知見が多数報告されてきたが、いずれもヒトを対象としており動物に関する知見はほとんどない。RMが視覚の予測的機能であることから、視覚を有する動物にも備わる機能である可能性が高い。そこで本研究では、RMがヒト・動物共通の視覚機能であるか否かを検討するため、ヒト・動物(ラット)共通の実験系によるRM実験を実施した。その結果、ヒト同様にラットもRM機能を有すること、また行動的相違点があることもわかり、従来のヒトRMの知見に加え、RMがヒト・動物に共通する視覚機能であるという新知見を示し、RMの新たな展望を提起した。

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Published: 2025-01-30  

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