A kinematic study of lingual coarticulation in VCV sequences

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Abstract
Intra-articulator anticipatory and carryover coarticulation were assessed in both temporal and spatial terms. Three subjects produced VCV [vowel-consonant-vowel] sequences with velar stop consonants and back vowels. Pulsed ultrasound was used to examine the vertical displacement, duration and maximum velocity of the tongue dorsum raising (VC transition), and lowering (CV transition) gestures. Anticipatory coarticulation was primarily temporal for 2 subjects, with decreases in the duration of the VC transition accompanying increases in displacement for the CV transition. Carryover coarticulation was primarily spatial for all 3 subjects, with decreases in CV displacement and maximum velocity accompanying increases in VC displacment. Evidently, these intra-articulator patterns can be accounted for in terms of an interaction between the raising gesture and a vowel-specific onset time of the lowering gesture towards the novel. The implications of this kinematic characterization are discussed.

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