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An empirical study on sensitivity to social influence in intergroup conflict situations

Research Project

Project/Area Number 17K04335
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Social psychology
Research InstitutionHiroshima Shudo University

Principal Investigator

Nakanishi Daisuke  広島修道大学, 健康科学部, 教授 (30368766)

Co-Investigator(Kenkyū-buntansha) 横田 晋大  広島修道大学, 健康科学部, 教授 (80553031)
井川 純一  大分大学, 経済学部, 准教授 (90748401)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords社会的ジレンマ / 集団間葛藤 / 文化的群淘汰 / 社会的影響 / 多層淘汰理論 / 社会的情報 / 多層淘汰 / 囚人のジレンマ / 協力 / 内集団バイアス / 多重淘汰理論
Outline of Final Research Achievements

Cultural group selection theory (Boyd & Richerson, 2005) argues that conformity to majority tendencies increase cooperation rates in social dilemma situations, and this theory is supported by simulations (Yokota & Nakanishi, 2012). However, subsequent simulations showed that in intergroup conflict situations, there is an adaptive basis not only for majority concurrence but also for minority concurrence, which leads to an overall decline in cooperation rates (Nakanishi & Yokota, 2015). This means that given the diversity of social influences, the scope of application of cultural group selection theory is limited. Based on the these findings, this study examined the ecological validity of a model of diverse social influences in intergroup conflict situations.

Academic Significance and Societal Importance of the Research Achievements

本研究では、他者の行動が見られる条件でのみ内集団への協力率が高くなるという結果が得られた。これは文化的群淘汰理論を支持するものであった。さらに、協力率と実験参加報酬との相関は 統制群 (1グループの社会的ジレンマ状況) でのみ負の相関関係が得られており、集団間葛藤の存在する他の条件では協力率が高いほど報酬額が少なくなるわけではないことが明らかになった。これは集団間葛藤の操作が十分に行われていたことを示すデータである。このように、自グループの他者の行動が見られることは自集団への貢献を増すが、それが結果的に集団間の葛藤を強めてしまうことには注意が必要であるという示唆が得られた。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Ingroup cooperation among Japanese baseball fans of a team in a vignette experiment2019

    • Author(s)
      中川裕美・横田晋大・中西大輔
    • Journal Title

      The Japanese journal of psychology

      Volume: 90 Issue: 1 Pages: 87-92

    • DOI

      10.4992/jjpsy.90.17335

    • NAID

      130007636881

    • ISSN
      0021-5236, 1884-1082
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Effect of Intergroup Conflict on Ingroup Cooperation and Conformity: An Experimental Vignette Study2017

    • Author(s)
      Yokota Kunihiro、Nakanishi Daisuke
    • Journal Title

      Japanese Psychological Research

      Volume: 59 Issue: 4 Pages: 309-317

    • DOI

      10.1111/jpr.12160

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Two types of ingroup cooperation, group-based and reciprocity-based psychological mechanisms.2018

    • Author(s)
      Nakagawa, Y., Yokota, K., & Nakanishi, D.
    • Organizer
      Human Behavior and Evolution Society
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ingroup cooperation and the frequency dependent strategy.2018

    • Author(s)
      Nakanishi, D., Yokota, K., Igawa, J., & Nakagawa, Y.
    • Organizer
      Human Behavior and Evolution Society
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 外集団の存在は互恵性の期待の効果を減じるか? 野球ファンを用いた場面想定法実験2018

    • Author(s)
      中川裕美・横田晋大・中西大輔
    • Organizer
      日本社会心理学会第59回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Ingroup favouritism in Japanese baseball fans.2017

    • Author(s)
      Nakagawa, Y., Yokota, K., & Nakanishi, D.
    • Organizer
      The European Conference on Psychology & the Behavioral Sciences
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 野球ファンの内集団ひいき--社会的アイデンティティ理論と閉ざされた一般互酬仮説の妥当性の検討--2017

    • Author(s)
      中川裕美・横田晋大・中西大輔
    • Organizer
      日本社会心理学会第58回大会
    • Related Report
      2017 Research-status Report
  • [Presentation] カープファンの内集団ひいき--社会的アイデンティティ理論と閉ざされた一般互酬仮説の妥当性の検討--2017

    • Author(s)
      中川裕美・横田晋大・中西大輔
    • Organizer
      日本心理学会第81回大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 野球ファンの内集団ひいき--協力行動のコストに着目して--2017

    • Author(s)
      中川裕美・中西大輔
    • Organizer
      中国四国心理学会第73回大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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