Do food images as action outcomes evoke a reward positivity?

Autor(en): Springer, Alina
Ohlendorf, Friederike
Schober, Jorg
Lange, Leon
Osinsky, Roman 
Stichwörter: Anterior midcingulate cortex; BAD; BRAIN POTENTIALS; Early Posterior Negativity; EMOTION; EVENT-RELATED POTENTIALS; EXPECTANCY; Feedback Related Negativity; FEEDBACK-RELATED NEGATIVITY; Food; Late Positive Potential; MEDIAL FRONTAL-CORTEX; Neurosciences; Neurosciences & Neurology; PREDICTION ERROR; Psychology; Psychology, Experimental; REFLECTS; Reward Positivity; VALENCE
Erscheinungsdatum: 2021
Volumen: 154
Favourable compared to unfavourable action outcomes typically evoke a positive-going amplitude shift at frontomedial electrodes in the scalp-recorded electroencephalogram. Since prior studies on this Reward Positivity (RewP) have heavily relied on monetary outcomes, it is still debated whether the RewP is also elicited by other kinds of reward. We addressed this issue by focussing on food as another major category of daily reward. Twenty-eight healthy participants completed a decision task, in which they received images of personally liked, neutral or disliked food as outcome stimuli. Importantly, single trial outcomes were of relevance for a prolonged task goal (i.e., obtaining the liked foods and avoiding the disliked foods). The observed amplitude pattern did not correspond to the typical RewP effect observed for monetary outcomes. In particular, disliked foods evoked a similar positive-going amplitude shift as liked foods when compared to neutral foods. Exploratory analyses indicated that this pattern may result from a spatiotemporal overlap between a potential RewP response and other, emotion-related ERP components (i.e., the Early Posterior Negativity and the Late Positive Potential). We discuss our findings with regard to theoretical and methodological implications for the usage of the RewP in the study of reward processing.
ISSN: 02782626
DOI: 10.1016/j.bc.2021.105804

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