人間における地域的な利他主義
Helen Bernhard1, Urs Fischbacher, Ernst Fehr
1University of Zurich, Institute for Empirical Research in Economics, Blumlisalpstrasse 10, CH-8006 Zurich, Switzerland.
Nature
|August 25, 2006
まとめ
社会的規範は協力を導くが,自分の集団を好む偏狭主義の影響を受けている. 実験では,処罰者が集団内での被害者をより保護し,集団内での規範違反が増加することを示しています.
科学分野:
- 社会科学 社会科学とは
- 進化生物学の進化生物学について
- 行動経済学は,行動経済学である.
背景:
- 社会規範と利他的な行動は,人間の協力と社会秩序にとって極めて重要です.
- 規範の遵守と執行は,しばしば集団間の対立や地域主義と結びついています.
研究 の 目的:
- 地域主義が先住民集団における社会規範の施行に及ぼす影響を調査する.
- 規範違反と罰則の文脈における偏狭主義の予測をテストする.
主な方法:
- パプアニューギニアの先住民グループで刑罰実験を行った.
- 規範違反者を罰するために"公正な"観察者を利用し,グループ属性を変化させた.
主要な成果:
- 処罰者は,集団内の被害者を,集団外の被害者に比べて不均衡に保護した.
- 規範違反者は,同じ集団の処罰者からの寛容を予想した.
- 規範違反は,罰を与える者と違反者が同じグループに属している場合により頻繁に発生しました.
結論:
- 実験の結果は,規範の施行における偏執主義の予測を裏付けている.
- この発見は,集団の絶滅や個人の選択のみに基づいた既存の進化論に異議を唱えている.
- 集団間の相互作用を社会行動の進化的モデルに組み込む必要性を強調する.
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