作業中断に対処する際の柔軟性は高齢者の利益がより大きい:作業記憶課題からの電気生理学的証拠
Stephan Getzmann1, Soner Ülkü1, Edmund Wascher1
1Leibniz Research Centre for Working Environment and Human Factors, Technical University of Dortmund.
Psychology and aging
|February 2, 2026
まとめ
高齢者は作業中断後の柔軟なタイミングから著しく恩恵を受け、作業記憶と注意制御を向上させ、若年成人匹敵する。この柔軟性は加齢に伴う認知機能低下を補うのに役立つ。
科学分野:
- 認知心理学
- 神経科学
- ヒューマンファクター工学
背景:
- 中断は職場では一般的であり、エラーにつながる可能性があり、特に加齢に伴う認知変化により高齢者に影響を与える。
- 注意制御と作業記憶の加齢に伴う低下により、高齢者は中断によるパフォーマンス低下の影響を受けやすくなる。
研究 の 目的:
- 中断後の柔軟なタイミングの利点が、若年成人よりも高齢者においてより顕著であるかどうかを調査する。
- 年齢層間で自己決定された中断タイミングが認知パフォーマンスに与える影響を調べる。
主な方法:
- 算術課題による中断を伴う、バーの向きを記憶する作業記憶課題。
- 参加者(若年および高齢の成人)は、中断とタスク再開の間で短い、長い、または自己決定された間隔を経験した。
- タスク検索中の脳活動、特にアルファ(α)活動を測定するために脳波(EEG)を使用した。
主要な成果:
- 中断は両年齢層のパフォーマンスに悪影響を及ぼし、高齢者の方がより大きな低下を示した。
- 高齢者は自己決定タイミングにより顕著なパフォーマンス向上を示し、若年成人に匹敵するレベルに達した。
- EEGデータは、柔軟な条件下でのタスク関連情報の検索が強化されたことを示し、両年齢層で同様のアルファ活動レベルを示した。
結論:
- 中断後のタスク再開における柔軟性は、高齢の従業員が加齢に伴う認知障害を軽減するのに役立つ。
- 柔軟な作業戦略を実装することは、中断が発生しやすい職場環境で高齢者がパフォーマンスを維持するのを支援できる。
- 自己決定タイミングは、加齢に伴う作業記憶と注意の課題を補うための重要な要素である。
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