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2004 Fiscal Year Final Research Report Summary

Dynamic characteristics of numerical dominancy judgment in visual cognition

Research Project

Project/Area Number 14510094
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 InstitutionOchanomizu University

Principal Investigator

ISHIGUCHI Akira  Ochanomizu University, Faculty of Letters and Education, Professor, 文教育学部, 教授 (10184508)

Project Period (FY) 2002 – 2004
KeywordsNumerical dominancy judgment / feature detection / dynamics / visual sampling / efficiency analysis / Sequential analysis / risk Judgment / gambling task
Research Abstract

The results of this study are as follows.
1.Numerical dominancy judgment and feature detection
We carried out some experiments on the numerical dominancy judgment with use of visual stimuli of which characteristics were pop-out and non pop-out found in the visual search studies. The results showed that the pop-out stimuli were overestimated in number, suggesting that the higher visual mechanism was involved in the process of the numerical dominancy judgment.
2.Dynamic characteristics of the numerical dominancy judgment
We studied the characteristics of numerical dominancy judgment in the condition that the number of elements in two stimulus sets was varied in time sequence. The results showed that the sensitivity to the numerosity change was lower in the dynamic display than in the static display, and that deviation from the equivalent proportion was less discriminated than the transition to equivalent proportion.. These results suggested both the degradation of sampling precision and the … More hysterisis involvement.
3.Inference of statistical characteristics in the visual sampling
We investigated some comparisons between the characteristics of sequential and simultaneous samplings in the task that participants were required to infer the population means of stimulus intensities of two sets which was one version of the numerical dominancy judgment task. The results showed that the numbers of the samplings calculated with use of the statistical efficiency analysis were smaller in the sequential than in the simultaneous sampling. These results matched to the prediction based on the sequential analysis.
4.The risk judgment and aging
We investigated the strategic characteristics of aged people in the visual gambling task which was a kind of the numerical dominancy judgment and prediction task The results showed that the aged subject had some difficulties to adopt the profitable strategy based on the data obtained in the process of the task, which would reflect the functional degradation of the working memory. Less

  • Research Products

    (3 results)

All 2005

All Journal Article (3 results)

  • [Journal Article] Proportion Judgment of Dynamic Events2005

    • Author(s)
      Midori Tokita, Akira Ishiguchi
    • Journal Title

      Annual Report of Cognitive & Kansei Science 1

      Pages: 22-40

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 高齢者のリスク判断の検討2005

    • Author(s)
      薬師神, 斉藤, 石口
    • Journal Title

      Annual Report of Cognitive & Kansei Science 1

      Pages: 16-21

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Risk judgment and aging2005

    • Author(s)
      Reiko Yakushijin, Tomoyuki Saito, Akira Ishiguchi
    • Journal Title

      Annual Report of Cognitive & Kansei Science 1

      Pages: 16-21

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2006-07-11  

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