title: Do talkers produce less dispersed phoneme categories in a clear speaking style?
abstract: This study investigated whether adaptations made in clear speaking styles result in more discriminable phonetic categories than in a casual style. Multiple iterations of keywords with word-initial /s/-/ʃ/ were obtained from 40 adults in casual and clear speech via picture description. For centroids, cross-category distance increased in clear speech but with no change in within-category dispersion and no effect on discriminability. However, talkers produced fewer tokens with centroids in the ambiguous region for the /s/-/ʃ/ distinction. These results suggest that, whereas interlocutor feedback regarding communicative success may promote greater segmental adaptations, it is not necessary for some adaptation to occur.
authors: Department of Speech, Hearing and Phonetic Sciences, University College London (UCL), Chandler House, 2 Wakefield Street, London WC1N 1PF, United Kingdom o.tuomainen@ucl.ac.uk, v.hazan@ucl.ac.uk.
authors: Outi
authors: O
authors: Tuomainen
authors: Department of Speech, Hearing and Phonetic Sciences, University College London (UCL), Chandler House, 2 Wakefield Street, London WC1N 1PF, United Kingdom o.tuomainen@ucl.ac.uk, v.hazan@ucl.ac.uk.
authors: Valerie
authors: V
authors: Hazan
authors: Speech & Hearing Bioscience and Technology, Division of Medical Sciences, Harvard University, TMEC 435, 260 Longwood Avenue, Boston, Massachusetts 02115, USA rachelromeo@fas.harvard.edu.
authors: Rachel
authors: R
authors: Romeo