乳児の姿勢の日内変動が養育者の発話入力を予測する
Hailey N Rousey1, Maximilian Tang1, Sahrai Garcia1
1University of California, Riverside, California, USA.
Developmental science
|January 6, 2026
まとめ
仰臥位や腹臥位の乳児には発話が少なく、座位や抱っこされている乳児には発話が多い。乳児の姿勢は発話入力に影響を与え、言語発達に影響を与える。
科学分野:
- 発達心理学
- 乳児運動発達
- 音声と言語獲得
背景:
- 乳児は、仰臥位、腹臥位、座位、直立位、抱っこなど、毎日さまざまな姿勢で過ごしている。
- これまでの研究では、発話入力と乳児の運動発達との関連が示唆されている。
- 特定の乳児の姿勢と成人発話入力の量の関係は、十分に探求されていない。
主な方法:
- 運動センサーを使用して姿勢を追跡した64人の乳児（4〜7ヶ月および11〜14ヶ月）の家庭用録音を利用した。
- 成人発話数を定量化するためにLENAオーディオレコーダーを使用した。
- 乳児の姿勢と成人発話頻度の相関を10分間隔で分析した。
結論:
- 乳児の姿勢は、受け取る発話の量に影響を与える重要な要因である。
- 本研究の結果は、早期言語発達の研究において姿勢を考慮することの重要性を強調している。
- 本研究の結果は、運動スキル獲得と言語発達を結びつける理論を部分的に支持するものである。
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