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Effect of auditory and motor rhythms on speech perception
Poster D66 in Poster Session D, Wednesday, October 25, 4:45 - 6:30 pm CEST, Espace Vieux-Port
Emma Berthault1, Simone Falk2,3, Benjamin Morillon1, Daniele Schön1; 1Aix Marseille University, Inserm, Institut de Neurosciences des Systèmes (INS), Marseille, France, 2Department of Linguistics and Translation, University of Montreal, Canada, 3International Laboratory for Brain, Music and Sound Research, Montreal, Canada
Speech perception and speech comprehension are enhanced when speech is preceded or accompanied by a similar rhythmic temporal structure (audio such as a metronome, or motor such as tapping). Although these phenomena have already been described, the respective contribution of the auditory and motor components has not been fully addressed. In this experiment, participants performed a speech perception task on degraded speech that was preceded by a rhythmic prime that could be auditory, motor or audio-motor. Our results indicate that auditory and audio-motor rhythmic primes facilitate speech perception. While the presence of a purely motor prime (free tapping) does not globally affect speech perception, a facilitation is visible whenever the movement is performed regularly. In order to better explain inter-individual variability, our participants also performed a Spontaneous Speech Synchronization test, allowing to evaluate speech perception-production coupling that resulted to be associated with our speech perception task. These findings are discussed in the framework of the dynamic attending and active sensing theories.
Topic Areas: Speech Perception,