title: Test of the movement expansion model: anticipatory vowel lip protrusion and constriction in French and English speakers.
abstract: The modeling of anticipatory coarticulation has been the subject of longstanding debates for more than 40 yr. Empirical investigations in the articulatory domain have converged toward two extreme modeling approaches: a maximal anticipation behavior (Look-ahead model) or a fixed pattern (Time-locked model). However, empirical support for any of these models has been hardly conclusive, both within and across languages. The present study tested the temporal organization of vocalic anticipatory coarticulation of the rounding feature from [i] to [u] transitions for adult speakers of American English and Canadian French. Articulatory data were synchronously recorded using an Optotrak for lip protrusion and a dedicated Lip-Shape-Tracking-System for lip constriction. Results show that (i) protrusion is an inconsistent parameter for tracking anticipatory rounding gestures across individuals, more specifically in English; (ii) labial constriction (between-lip area) is a more reliable correlate, allowing for the description of vocalic rounding in both languages; (iii) when tested on the constriction component, speakers show a lawful anticipatory behavior expanding linearly as the intervocalic consonant interval increases from 0 to 5 consonants. The Movement Expansion Model from Abry and Lallouache [(1995a) Bul. de la Comm. Parlée 3, 85-99; (1995b) Proceedings of ICPHS 4, 152-155.] predicted such a regular behavior, i.e., a lawful variability with a speaker-specific expansion rate, which is not language-specific.
authors.affiliation: Haskins Laboratories, 300 George Street, Suite 900, New Haven, Connecticut 06511, USA. aude.noiray@haskins.yale.edu
authors.forename: Aude
authors.initials: A
authors.lastname: Noiray
authors.forename: Marie-Agnès
authors.initials: MA
authors.lastname: Cathiard
authors.forename: Lucie
authors.initials: L
authors.lastname: Ménard
authors.forename: Christian
authors.initials: C
authors.lastname: Abry
mesh_terms: D000328:Adult; D059031:Anticipation, Psychological; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007802:Language; D008046:Lip / Q000502:physiology*; D008297:Male; D008954:Models, Biological; D010700:Phonetics; D013061:Speech Acoustics; D013997:Time Factors; D014741:Video Recording; D055815:Young Adult