読解における予測可能性効果は、視空間ワーキングメモリ負荷によって調節されない
1Department of English, Linguistics and Theatre Studies, National University of Singapore, Block AS5, 7 Arts Link, Singapore, 117570, Singapore. aine.ito@nus.edu.sg.
Memory & cognition
|January 29, 2026
まとめ
予測可能な単語は読書速度が速く、この効果は認知負荷が高い場合でも持続する。視空間ワーキングメモリ(WM)は、読書中に次にくる単語を予測するために不可欠ではない。
科学分野:
- 認知心理学
- 神経科学
- 言語学
背景:
- 読書には単語の予測可能性の処理が含まれ、期待される単語の認識が速い。
- 予測可能性効果を調節する上でのワーキングメモリ(WM)の限界の役割は、依然としてよく理解されていない。
研究 の 目的:
- 読書中の予測可能な単語の処理に視空間ワーキングメモリ(WM)の利用可能性がどのように影響するかを調査する。
- リアルタイムでの単語確率の計算にWMリソースが必要かどうかを判断する。
主な方法:
- ネイティブ英語話者を対象に、2つの事前登録された実験を実施した。
- 実験1では、視線持続時間とスキップ確率を測定した。
- 実験2では、自己ペース読書時間を用いて、異なるWM負荷下での予測可能性に敏感な読書指標を評価した。
主要な成果:
- 予測可能性とWM負荷の両方が、測定値全体で読書時間に有意に影響した。実験2では、予測可能性とWM負荷の間に相互作用が観察されたが、実験1では観察されなかった。実験2のフォローアップ分析では、実験1の結果が再現され、相互作用は見られず、最初の相互作用は人工物であることを示唆した。
結論:
- 読書における予測可能性効果は、認知的に要求の高い条件下でも堅牢である。
- 読書中の次にくる単語確率のオンライン計算には、視空間WMリソースは必要ない。
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