Abstract
For over 35 years, the stop-signal paradigm [cf. Ladefoged et al., J. Acoust. Soc. Am. 54, 1105–1108 (1973)] has been neglected in speech research. An experiment was conducted in which speakers were given a stop-signal either just prior to or during the production of monosyllabic and disyllabic nonword sequences, which contrasted in stress pattern and place of onset consonant articulation. Acoustic and articulatory kinematic data were collected with the aim of determining how speakers halt speech mid-utterance. It was hypothesized that upcoming syllable stress may influence how quickly speech can be terminated. Three findings of interest will be presented: (1) speakers halt speech more slowly when signaled to do so prior to a stressed syllable than an unstressed syllable; (2) to halt airflow, many speakers use an upcoming onset consonant gesture in the target utterance, in addition to a glottal stop; (3) a number of changes occur in the relative timing of laryngeal and supralaryngeal gestures prior to stoppage of speech. A dynamical model will be presented of amplitude-coupled stress, syllable, and articulatory planning systems, which can simulate the effects of syllable stress on stop-signal RT and observed changes in the relative timing of articulatory gestures.
Published Version
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