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不安と記憶が選択の一貫性に及ぼす影響
Fei Xin1, Jialuo Lai1, Manru Guo1
1School of Psychology, Shenzhen University, Shenzhen, China.
Annals of the New York Academy of Sciences
|January 8, 2026
まとめ
状態不安は記憶検索を妨げることにより選択の一貫性を損ない、意思決定の信頼性を低下させる。アイテムを記憶することは一貫性を向上させるが、不安は神経資源の配分を変化させることによりこの効果を上回る。
科学分野:
- 認知神経科学
- 意思決定科学
- 神経経済学
背景:
- 選択の一貫性は合理的な意思決定に不可欠であるが、現実のシナリオではしばしば逸脱する。
- 不安や記憶などの選択のばらつきに影響を与える要因を理解することは極めて重要である。
研究 の 目的:
- 状態不安と記憶が選択の一貫性を動的に調節する方法を調査する。
- これらの調節の根底にある神経メカニズムを探る。
主な方法:
- 計算モデリング、神経画像(fMRI)、および行動評価を組み合わせた。
- ショックの脅威パラダイムを使用して状態不安を誘発した。
- 食品アイテムの選択の一貫性と記憶検索を評価した。
主要な成果:
- 記憶されたアイテムは、より一貫性があり、より速い選択につながり、意思決定閾値の低下と関連していた。
- 状態不安は選択の一貫性と記憶検索を損ない、精度低下は意思決定の速さと相関していた。
- 背外側前頭前野(dlPFC)の活性化は選択の一貫性を予測した。眼窩前頭皮質(OFC)の関与は記憶精度を予測した。
- 不安は神経資源を再配分し、感覚運動および記憶領域を抑制する一方で、感情的顕著性ネットワークを増強した。
結論:
- 不安は主に記憶検索プロセスを損なうことによって選択の一貫性を損なう。
- 記憶検索は、価値に基づく選好を安定させ、一貫した選択を保証するために重要である。
- 不安下での神経資源の再配分は、意思決定の安定性と記憶パフォーマンスに大きく影響する。
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