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How Do Eyewitnesses Report When They Observed The Same Event Differently?

Research Project

Project/Area Number13610081
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 InstitutionShinshu University

Principal Investigator

MORI Kazuo  Shinshu University, Faculty of Education, Professor, 教育学部, 教授 (30157854)

Co-Investigator(Kenkyū-buntansha) MORI Hideko  Bunka Women's University Nagano College, Department of Nursery, Instructor, 長野専門学校, 講師
Project Period (FY) 2001 – 2003
Project Status Completed(Fiscal Year 2003)
Budget Amount *help
¥3,200,000 (Direct Cost : ¥3,200,000)
Fiscal Year 2003 : ¥800,000 (Direct Cost : ¥800,000)
Fiscal Year 2002 : ¥500,000 (Direct Cost : ¥500,000)
Fiscal Year 2001 : ¥1,900,000 (Direct Cost : ¥1,900,000)
KeywordsMORI technique / eyewitness testimony / memory distortion / conformity / polarizing filters / 目撃記憶 / 話し合い / 親子 / 小学生 / 保育園児 / プロトコル分析 / 見まちがい / アニメーション映像 / 偏光サングラス
Research Abstract

A new presentation technique (Manipulation of Overlapping Rivalrous Images by polarizing filters, MORI) was invented for presenting two different movies on the same screen to be seen separately by two groups of viewers without them noticing the overlap. It can easily create desired artificial conflicts among viewers. Two polarizing filters perpendicular to each other provide separate invisible channels from dual video projectors to two groups of viewers via a single screen. The basic principle of the presentation technique, details of the apparatus, and limitations were reported in Mori (2003).
The results from eyewitness experiments utilizing the MORI technique conducted by the head, investigator and collaborators have revealed that eyewitnesses tend to conform to their co-viewers, regardless of age, gender, or personality. Those research findings were presented at international meetings, such as the 25th International Congress of Applied Psychology, Tsukuba International Conferences on Memory, and Annual Conventions of American Psychological Society. The research outcomes have been submitted to academic journals (Hirokawa, Matsuno, Ukita,& Mori, 2003,Mori & Mori,2003).
In Mori & Mori (2003),two experiments were carried out with a total of 138 undergraduates in groups of varying sizes to examine the effects of the presence of a co-witness on the witnesses' memory distortion. Experiment 1 investigated the co-witness effects in a one-versus-two situation, while Experiment 2 investigated the effects in a two-versus-two situation. Results from Mori & Mori (2003) and the preceding study (Kanematsu, Mori,& Mori,2003) showed that isolated eyewitnesses changed their minds more frequently and unilaterally in accordance with the majority, whereas when they had a co-witness who shared the same information, they tended to maintain their original reports even after being confronted with conflicting information in a discussion.

Report

(4results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report

Research Products

(11results)

All Other

All Publications

  • [Publications] Mori, K., Mori, H.: "Memory Distortion of Isolated Eyewitnesses in an Experimental Collaborative Eyewitness Testimony."Journal of Applied Social Psychology (under review). (印刷中)(Submitted). (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirokawa, K., Matsuno, E., Ukita, J., Mori, K.: "Effects of sex and masculinity-femininity on recalled memories in an experimental collaborative eyewitness testimony."Basic and Applied Social Psychology (under review). (印刷中)(Submitted). (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kanematsu, H., Mori, K., Mori, H.: "Memory distortion in eyewitness pairs who observed nonconforming events and discussed them."Journal of the Faculty of Education Shinshu University. No.109. 75-84 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mori, K.: "Surreptitiously projecting different movies to two subsets of viewers."Behavior Research Methods, Instruments, and Computers. 35. 599-604 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mori, K., Mori, H.: "Memory Distortion of Isolated Eyewitnesses in an Experimental Collaborative Eyewitness Testimony."Journal of Applied Social Psychology (under review). (Submitted). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hirokawa, K., Matsuno, E., Ukita, J., Mori, K.: "Effects of sex and masculinity-femininity on recalled memories in an experimental collaborative eyewitness testimony."Basic and Applied Social Psychology (under review). (Submitted). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kanematsu H, Mori, K., Mori, H.: "Memory distortion in eyewitness pairs who observed nonconforming events and discussed them."Journal of the Faculty of Education Shinshu University. No.109. 75-84 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Mori, K.: "Surreptitiously projecting different movies to two subsets of viewers."Behavior Research Methods, Instruments, and Computers. 35. 599-604 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kazuo Mori: "Surreptitiously projecting different movies to two subsets of viewers"Behavior Research Methods, Instruments, and Computers. Vol.35(4). 599-604 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.kanematsu, K.Mori, H.Mori: "Memory distortion in eyewitness pairs who observed nonconforming events and discussed them"信州大学教育学部紀要(Journal of the Faculty of Education Sinshu University). No.109. 75-84 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kazuo Mori: "Surreptitiously projecting a different movie to two subsets of viewers"Behavior Research Methods, Instruments, and Computers. (未定). (2003)

    • Related Report
      2002 Annual Research Report

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Published : 2001-04-01   Modified : 2016-04-21  

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