Using the Self-Select Paradigm to Delineate the Nature of Speech Motor Programming

Wright, David L.; Robin, Don A.; Jooyhun Rhee; Vaculin, Amber; Jacks, Adam; Guenther, Frank H.; Fox, Peter T.
June 2009
Journal of Speech, Language & Hearing Research;Jun2009, Vol. 52 Issue 3, p755
Academic Journal
Purpose: The authors examined the involvement of 2 speech motor programming processes identified by S. T. Klapp (1995, 2003) during the articulation of utterances differing in syllable and sequence complexity. According to S. T. Klapp, 1 process, INT, resolves the demands of the programmed unit, whereas a second process, SEQ, oversees the serial order demands of longer sequences. Method: A modified reaction time paradigm was used to assess INT and SEQ demands. Specifically, syllable complexity was dependent on syllable structure, whereas sequence complexity involved either repeated or unique syllabi within an utterance. Results: INT execution was slowed when articulating single syllables in the form CCCV compared to simpler CV syllables. Planning unique syllables within a multisyllabic utterance rather than repetitions of the same syllable slowed INT but not SEQ. Conclusions: The INT speech motor programming process, important for mental syllabary access, is sensitive to changes in both syllable structure and the number of unique syllables in an utterance.


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