Laboratoire de Phonétique, Université du Québec à Montréal, Montreal, Quebec, Canada.
Centre for Research on Brain, Language and Music, Montreal, Quebec, Canada.
PLoS One. 2024 Aug 22;19(8):e0306246. doi: 10.1371/journal.pone.0306246. eCollection 2024.
This study investigates the development of sensorimotor relationships by examining adaptation to real-time perturbations of auditory feedback.
Acoustic signals were recorded while preschoolers and adult speakers of Canadian French produced several utterances of the front rounded vowel /ø/ for which F2 was gradually shifted up to a maximum of 40%.
The findings indicate that, although preschool-aged children produced overall similar responses to the perturbed feedback, they displayed significantly more trial-to-trial variability than adults. Furthermore, whereas the magnitude of the adaptation in adults was positively correlated with the slope of the perceptual categorical function, the amount of adaptation in children was linked to the variability of their productions in the baseline condition. These patterns suggest that the immature motor control observed in children, which contributes to increased variability in their speech production, plays a role in shaping adaptive behavior, as it allows children to explore articulatory/acoustic spaces and learn sensorimotor relationships.
本研究通过考察对听觉反馈实时干扰的适应，来研究感觉运动关系的发展。
在加拿大法语的学龄前儿童和成年说话者说出几个前圆唇元音 /ø/ 的发音时，记录了声学信号，其中 F2 逐渐上升到最大值 40%。
研究结果表明，尽管学龄前儿童对受干扰的反馈产生了总体相似的反应，但他们的试验间变异性明显高于成年人。此外，成年人的适应程度与感知范畴函数的斜率呈正相关，而儿童的适应程度与他们在基线条件下的发音变异性有关。这些模式表明，儿童在运动控制方面的不成熟，导致其言语产生的变异性增加，这在塑造适应性行为方面发挥了作用，因为它允许儿童探索发音/声学空间并学习感觉运动关系。
