Dissociating linguistic and non-linguistic gesture processing: electrophysiological evidence from American Sign Language.

Brain and Language
Michael GrosvaldD Corina

Abstract

A fundamental advance in our understanding of human language would come from a detailed account of how non-linguistic and linguistic manual actions are differentiated in real time by language users. To explore this issue, we targeted the N400, an ERP component known to be sensitive to semantic context. Deaf signers saw 120 American Sign Language sentences, each consisting of a "frame" (a sentence without the last word; e.g. BOY SLEEP IN HIS) followed by a "last item" belonging to one of four categories: a high-close-probability sign (a "semantically reasonable" completion to the sentence; e.g. BED), a low-close-probability sign (a real sign that is nonetheless a "semantically odd" completion to the sentence; e.g. LEMON), a pseudo-sign (phonologically legal but non-lexical form), or a non-linguistic grooming gesture (e.g. the performer scratching her face). We found significant N400-like responses in the incongruent and pseudo-sign contexts, while the gestures elicited a large positivity.

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Citations

Aug 26, 2014·Journal of Deaf Studies and Deaf Education·David P CorinaKearnan Welch
May 23, 2013·Cerebral Cortex·Naja Ferjan RamirezRachel I Mayberry
Jul 31, 2013·Neuropsychologia·Jana HosemannMatthias Schlesewsky
Jan 22, 2019·Language, Cognition and Neuroscience·Gabriela MeadeKaren Emmorey
Mar 28, 2019·Frontiers in Psychology·Josep Quer, Markus Steinbach
Oct 13, 2020·Neurobiology of Language·Karen EmmoreyPhillip J Holcomb

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