Transient and sustained incentive effects on electrophysiological indices of cognitive control in younger and older adults

Williams, Ryan S, Kudus, Farrah, Dyson, Ben and Spaniol, Julia (2018) Transient and sustained incentive effects on electrophysiological indices of cognitive control in younger and older adults. Cognitive, Affective, and Behavioral Neuroscience. ISSN 1530-7026 (Accepted)

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Abstract

Preparing for upcoming events, separating task-relevant from task-irrelevant information and efficiently responding to stimuli all require cognitive control. The adaptive recruitment of cognitive control depends on activity in the dopaminergic reward system as well as the frontoparietal control network. In healthy aging, dopaminergic neuromodulation is reduced, resulting in altered incentive-based recruitment of control mechanisms. In the present study, younger adults (18–28 years) and healthy older adults (66–89 years) completed an incentivized flanker task that included gain, loss, and neutral trials. Event-related potentials (ERPs) were recorded at the time of incentive cue and target presentation. We examined the contingent negative variation (CNV), implicated in stimulus anticipation and response preparation, as well as the P3, which is involved in the evaluation of visual stimuli. Both younger and older adults showed transient incentive-based modulation of CNV. Critically, cue-locked and target-locked P3s were influenced by transient and sustained effects of incentives in younger adults, while such modulation was limited to a sustained effect of gain incentives on cue-P3 in older adults.
Overall, these findings are in line with an age-related reduction in the flexible recruitment of preparatory and target-related cognitive control processes in the presence of motivational incentives.

Item Type: Article
Keywords: aging, flanker task, event-related potentials, CNV, P3, reward
Schools and Departments: School of Psychology > Psychology
Depositing User: Ellena Adams
Date Deposited: 24 Jan 2018 13:33
Last Modified: 24 Jan 2018 13:33
URI: http://sro.sussex.ac.uk/id/eprint/73112

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