Abstract - ASA Victoria – November 2018 – Special Session: Coupling Phonetics and Psycholinguistics Poster on the next page Linking production and perception of clear speech Joan A. Sereno, Allard Jongman, Charles Redmon, Yuyu Zeng, Linguistics, Univ. of Kansas; Yue Wang, Beverly Hannah, Keith Leung, Sylvia Cho, Linguistics, Simon Fraser Univ.; Ghassan Hamarneh, Lisa Tang, Computer Science, Simon Fraser Univ.; Saurabh Garg, Pacific Parkinson's Research Centre, Univ. of British Columbia; Paul Tupper, Mathematics, Simon Fraser Univ.; Bob McMurray, Psychology, Univ. of Iowa Speech communication involves multiple styles as a function of different speaking environments and communicative needs. In auditorily or visually challenging contexts, speakers often alter their speech production using a clarified, hyper-articulated speech style with the intention of enhancing speech intelligibility. Such modifications may result in perceptible articulatory and acoustic changes. Questions thus arise as to whether and what clear-speech modifications facilitate perception. This presentation surveys recent research conducted in our labs, investigating clear-speech production and its associated effects on perception. In a series of three- stream studies, this research relates analyses of visible articulatory features using computer image-processing techniques, measurements of acoustic properties, and perceptual patterns of clear-speech segments and suprasegmentals by native and non-native perceivers. Results reveal that clear (relative to plain) speech modulates different and compensatory articulatory-acoustic cues to enhance intelligibility. However, clear-speech modifications that reduce phonemic contrastivity are also found and they inhibit intelligibility. These results indicate that clear-speech effects are governed by the collateral principles of cue enhancement and maintenance of category distinctiveness.