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Updated: Feb 6, 2026

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数的大小が空間的決定に影響を与える:複雑な動きにおける空間的・数的関連性の証拠
Mauro Murgia1, Angelica Ielo1, Stefano Pileggi1
1Department of Life Sciences, University of Trieste, Trieste, Italy.
Cognition
|February 4, 2026
まとめ
空間的・数的関連性(SNA)効果は歩行にも及ぶ。小さい数字は左向きの歩行、大きい数字は右向きの歩行に影響を与える。これは複雑な運動課題においても同様である。
科学分野:
- 認知心理学
- 神経科学
- ヒト運動科学
背景:
- 空間的・数的関連性(SNA)は、数の大きさと空間的な反応側(小さい数字は左、大きい数字は右)を結びつける。
- SNAは通常、反応時間を測定する単純なキープレスタスクで研究されている。
- SNAが複雑な自由反応運動に及ぼす影響は、まだ十分に理解されていない。
研究 の 目的:
- 数の大きさに伴う空間的バイアス(左右)が歩行の決定に生じるかどうかを調査する。
- 複雑な運動行動を伴う自由反応課題におけるSNA効果を検討する。
- 数の処理が主たる課題とは無関係な場合でも、これらの効果が持続するかどうかを判断する。
主な方法:
- 自由反応歩行課題のために仮想現実環境を利用した。
- 参加者は歩行前に数の大きさ(実験1)または偶奇性(実験2)を処理した。
- 数字1~9に対する歩行方向と軌道のずれを評価した。
主要な成果:
- 小さい数字に対しては左向きの歩行決定、大きい数字に対しては右向きの歩行決定が多くなることを実証した。
- 数字の大きさに合わせた歩行軌道の適合的なずれを観察した。
- 数の大きさの分類および偶奇性判断課題の両方でSNA効果を確認した。
結論:
- 空間的・数的関連性(SNA)効果は、自発的な歩行決定と軌道に影響を与える。
- これらの効果は、単純な反応時間パラダイムを超えて、自由反応課題において発生する。
- 数が課題の主要な特徴ではない場合でも、数の大きさは運動に影響を及ぼす。
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