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Prediction, feedback and adaptation in speech imitation

MPG-Autoren
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Franken,  Matthias K.
Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society;
FC Donders Centre for Cognitive Neuroimaging;

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Hagoort,  Peter
Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society;
FC Donders Centre for Cognitive Neuroimaging;

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Acheson,  Daniel J.
Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society;
FC Donders Centre for Cognitive Neuroimaging;

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Zitation

Franken, M. K., Hagoort, P., & Acheson, D. J. (2014). Prediction, feedback and adaptation in speech imitation. Talk presented at the Donders Discussions 2014. Nijmegen, Netherlands. 2014-10-30 - 2014-10-31.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002B-ABF4-A
Zusammenfassung
Speech production is one of the most complex motor skills, and involves close interaction between the perceptual and the motor system. Recently, prediction via forward models has been at the forefront of speech neuroscience research. For example, neuroimaging evidence has demonstrated that activation of the auditory cortex is suppressed to self-produced speech relative to listening without speaking. This finding has been explained via a forward model that predicts the auditory consequences of our own speech actions. An accurate prediction cancels out (part of) the auditory cortical activation. The present study was designed to test two critical predictions from these frameworks: First, whether the cortical auditory response during speech production varies as a function of the acoustic distance between feedback and prediction, and second, whether this in turn is predictive of the amount of adaptation in people’s speech production. MEG was recorded while subjects performed an online speech imitation task. Each subject heard and imitated Dutch vowels, varying in their distance from the original vowel in both F1 and F2. The results did not show clear evidence that the amount of suppression scaled with the distance between participants’ speech and the speech target. However, we found that subjects’ auditory response did correlate with imitation performance. This result supports the view that an enhanced auditory response may act as an error signal, driving subsequent speech adaptation. This suggests that individual differences in SIS could act as a marker for subsequent adaptation.