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Development of speaking rate: a kinematic perspective
Ignatius Nip and Jordan Green

This study investigates the role of physiologic factors in the development of speaking rate. Orofacial movements were recorded using a motion capture system in 60 participants ranging in age from four years to adulthood. Speaking tasks included syllables and sentences, and a story retell task. All participants also performed a diadochokinetic task. Age-related changes in speaking rate, articulation rate, peak articulatory speed, and pause time will be reported. We hypothesize that articulatory speed will be closely associated to increases in speaking rate with age. In the future, the quantitative information gained from this study may assist in clinical decision making for gauging the degree of delay in children with speech impairments and the degree of improvement in speech treatment.

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