A common neural account for social and non-social decisions

Arabadzhiyska, D. H., Garrod, O. G.B., Fouragnan, E., De Luca, E., Schyns, P. G. and Philiastides, M. (2022) A common neural account for social and non-social decisions. Journal of Neuroscience, 42(48), pp. 9030-9044. (doi: 10.1523/JNEUROSCI.0375-22.2022) (PMID:36280264) (PMCID:PMC9732824)

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Abstract

To date, social and non-social decisions have been studied largely in isolation. Consequently, the extent to which social and non-social forms of decision uncertainty are integrated using shared neurocomputational resources remains elusive. Here, we address this question using simultaneous EEG-fMRI in healthy human participants (young adults of both sexes) and a task in which decision evidence in social and non-social contexts varies along comparable scales. First, we identify time-resolved build-up of activity in the EEG, akin to a process of evidence accumulation, across both contexts. We then use the endogenous trial-by-trial variability in the slopes of these accumulating signals to construct parametric fMRI predictors. We show that a region of the posterior-medial frontal cortex (pMFC) uniquely explains trial-wise variability in the process of evidence accumulation in both social and non-social contexts. We further demonstrate a task-dependent coupling between the pMFC and regions of the human valuation system in dorso- and ventro-medial prefrontal cortex across both contexts. Finally, we report domain-specific representations in regions known to encode the early decision evidence for each context. These results are suggestive of a domain-general decision-making architecture, whereupon domain-specific information is likely converted into a “common currency” in medial prefrontal cortex and accumulated for the decision in the pMFC.

Item Type:Articles
Additional Information:This work was supported in part by the European Research Council (865003; MGP) and the Economic and Social Research Council (ES/L012995/1; MGP). EF was supported by a UKRI Future Leaders Fellowship (MR/T023007/1).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:De Luca, Dr Emanuele and Philiastides, Professor Marios and Arabadzhiyska, Desislava and Garrod, Dr Oliver and Schyns, Professor Philippe and Fouragnan, Dr Elsa
Authors: Arabadzhiyska, D. H., Garrod, O. G.B., Fouragnan, E., De Luca, E., Schyns, P. G., and Philiastides, M.
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
Journal Name:Journal of Neuroscience
Publisher:The Society for Neuroscience
ISSN:0270-6474
ISSN (Online):0270-6474
Published Online:24 October 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Journal of Neuroscience 42(48): 9030-9044
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
170631Neural correlates of learning and confidence during decision making and their utility in developing "intelligent technologies".Marios PhiliastidesEconomic and Social Research Council (ESRC)ES/L012995/1Centre for Cognitive Neuroimaging