Journal article

Extraversion and reward-processing: Consolidating evidence from an electroencephalographic index of reward-prediction-error

Luke D Smillie, Hayley K Jach, David M Hughes, Jan Wacker, Andrew J Cooper, Alan D Pickering

Biological Psychology | ELSEVIER | Published : 2019


Trait extraversion has been theorized to emerge from functioning of the dopaminergic reward system. Recent evidence for this view shows that extraversion modulates the scalp-recorded Reward Positivity, a putative marker of dopaminergic signaling of reward-prediction-error. We attempt to replicate this association amid several improvements on previous studies in this area, including an adequately-powered sample (N = 100) and thorough examination of convergent-divergent validity. Participants completed a passive associative learning task presenting rewards and non-rewards that were either predictable or unexpected. Frequentist and Bayesian analyses confirmed that the scalp recorded Reward Posi..

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