社会的な不確実性の中で集団の意思決定を行う参加者ダイアードは,搾取的な戦略を採用し,脳間シンクロニティの強化を示します
Xiaorong Gan1, Linwei Yu1, Shuyi Li1
1Shanghai Key Laboratory of Mental Health and Psychological Crisis Intervention, School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, PR China.
Biological psychology
|February 12, 2026
まとめ
不確実な状況下でのグループ意思決定は,新しい選択肢を探求するよりも過去の成功を活用することを好みます. この戦略は,個体間の同期した脳活動,特に右側テンポロ・ペリエタル交差点に関連しています.
科学分野:
- 認知神経科学とは
- 社会心理学 社会心理学とは
- 意思決定科学 意思決定科学
背景:
- 社会的な不確実性下でのグループ意思決定は,しばしば偏った行動につながります.
- 2つの仮説が存在します:グループは新しいオプションを探求するか,過去の成功を活用します.
研究 の 目的:
- 集団が社会的不確実性の中で探求するか,搾取するのかを調査する.
- グループ意思決定の基礎となる神経機構,特に対人間の脳シンクロニー (IBS) を調べる.
主な方法:
- Dyadsは,機能的近赤外線スペクトロスコピー (fNIRS) ハイパースキャンを使用して脳活動を測定した信頼ゲームを実施しました.
- 計算モデリングは意思決定戦略を分析した.
- 脳から脳への接続性の分析は,対人間の脳シンクロニー (IBS) を評価した.
主要な成果:
- グループでは,利益条件下での投資の増加を示し,搾取戦略を示した.
- 搾取は,右側テンポロペリエタル結節 (rTPJ) の強化されたIBSと関連付けられました.
- 搾取戦略と強化されたIBSは,ゲームの後半に登場した.
結論:
- 参加者ダイアードは,過去のポジティブな経験に基づいて,社会的不確実性の中で搾取戦略を採用します.
- rTPJにおける人際的なシンクロニティの強化は,グループの投資の増加と関連しています.
- この研究は,不確実な状況下でのグループ決定を推進する認知および脳間プロセスを明らかにしています.
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