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Neural correlates of verbal joint action: ERPs reveal common perception and action systems in a shared-Stroop task

Demiral, Sukru Baris, Gambi, Chiara ORCID:, Nieuwland, Mante S. and Pickering, Martin J. 2016. Neural correlates of verbal joint action: ERPs reveal common perception and action systems in a shared-Stroop task. Brain Research 1649 (Part A) , pp. 79-89. 10.1016/j.brainres.2016.08.025

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Recent social-cognitive research suggests that the anticipation of co-actors' actions influences people's mental representations. However, the precise nature of such representations is still unclear. In this study we investigated verbal joint representations in a delayed Stroop paradigm, where each participant responded to one color after a short delay. Participants either performed the task as a single actor (single-action, Experiment 1), or they performed it together (joint-action, Experiment 2). We investigated effects of co-actors' actions on the ERP components associated with perceptual conflict (Go N2) and response selection (P3b). Compared to single-action, joint-action reduced the N2 amplitude congruency effect when participants had to respond (Go trials), indicating that representing a co-actor's utterance helped to dissociate action codes and attenuated perceptual conflict for the responding participant. Yet, on NoGo trials the centro-parietal P3 (P3b) component amplitude increased for joint-action, suggesting that participants mapped the stimuli onto the co-actor's upcoming response as if it were their own response. We conclude that people represent others' utterances similarly to the way they represent their own utterances, and that shared perception-action codes for self and others can sometimes reduce, rather than enhance, perceptual conflict.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Publisher: Elsevier
ISSN: 0006-8993
Date of First Compliant Deposit: 12 December 2017
Date of Acceptance: 18 August 2016
Last Modified: 07 Nov 2023 05:38

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