Reward modulates adaptations to conflict.
Both cognitive conflict (e.g. Verguts & Notebaert, 2009) and reward signals (e.g. Waszak & Pholulamdeth, 2009) have been proposed to enhance task-relevant associations. Bringing these two notions together, we predicted that reward modulates conflict-based sequential adaptations in cognitive control. This was tested combining either a single flanker task (Experiment 1) or a task-switch paradigm (Experiment 2) with performance-related rewards. Both experiments confirmed that adaptations after conflict were modulated by reward. In the flanker task, this resulted in increased conflict adaptation after rewarded trials. In the task-switching experiment, reward increased the conflict-modulated switch cost. Interestingly, both adaptations to conflict disappeared after no-reward trials. Moreover, individual differences in participants' sensitivity to reward predicted these reward modulations of trial-to-trial adaptations. These findings shed new light on the exact role of cognitive conflict in shaping subsequent behavior.
Department of Experimental Psychology, Ghent University, Ghent, Belgium. Senne.Braem@ugent.be
Senne
S
Braem
Tom
T
Verguts
Chantal
C
Roggeman
Wim
W
Notebaert
D000223:Adaptation, Psychological; D000293:Adolescent; D003071:Cognition; D003220:Conflict, Psychological; D005260:Female; D006801:Humans; D008297:Male; D012054:Reinforcement, Psychology; D012201:Reward; D055815:Young Adult