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Hearing and Donuts (Brain and Bagels) Seminar
April 16, 2021 @ 8:30 am - 9:30 am
Presenter: Robin Karlin, Ph.D., Postdoctoral Researcher (Parrell lab), Waisman Center, University of Wisconsin-Madison
Topic: The Domain Generalizability of Cerebellar Timing Mechanisms: a Preliminary Study
There is evidence that the cerebellum is crucial to processing the duration of single events (“event timing”). Speakers with ataxic dysarthria frequently manifest temporal deficits in both speech production and perception, most apparently in phonological length contrasts, which suggests that these contrasts utilize event timing. However, it is unknown if the same cerebellar circuit is responsible for timing in both the perceptual and production domains, as well as the speech and non-speech domains. In this talk I will present results from a pilot study examining the relationship between the production of event timing in speech and non-speech tasks. The speech production task used a 19-step continuum with vowel length manipulated such that the endpoints are perceived as “mob” (long) and “mop” (short). The non-speech task used a similar continuum of pure tones. In both speech and non-speech tasks, participants heard a token from the continuum and imitated it, either by speaking (speech task) or holding down a spacebar (non-speech task). The pilot is a subset of tasks from a larger planned study comprising four experiments: speech production, speech perception, non-speech production, and non-speech perception. I will also discuss some methods used for conducting this study online with unknown (not locally recruited) participants using Prolific and Gorilla.