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. 2021 Dec;58(12):e13938.
doi: 10.1111/psyp.13938. Epub 2021 Sep 5.

Working memory load reduces the processing of outcome evaluation involving others but not oneself: Event-related potential evidence

Huiyan Lin  1   2 , Jiafeng Liang  3
Affiliations

Working memory load reduces the processing of outcome evaluation involving others but not oneself: Event-related potential evidence

Huiyan Lin et al. Psychophysiology. 2021 Dec.

Abstract

Previous event-related potential (ERP) studies have suggested that self-related and non-self-related outcomes are processed simultaneously. However, the studies investigated situations in which individuals had sufficient attentional/cognitive resources to process both of the outcomes. It is unknown whether self-related and non-self-unrelated outcomes could still be processed simultaneously when resources are limited. To address this issue, 32 female participants in the present study were asked to perform a working memory task. To manipulate the amount of available attentional/cognitive resources, participants were asked to memorize a letter in the low load condition and five letters in the high load condition. During letter consolidation, participants were informed that they and another player each performed a gambling task and were subsequently presented with both of the outcomes. ERP results showed that others' monetary loss elicited larger P200 and late positive potential amplitudes than others' monetary gain under a low working memory load, whereas a high load reduced these effects. However, working memory load did not influence the effect of self-outcome on ERP responses. Therefore, the findings suggest that the amount of available attentional/cognitive resources alters the evaluation of non-self-related but not self-related outcomes.

Keywords: ERPs; LPP; P200; attentional/cognitive resources; outcome evaluation; self-related and non-self-related outcomes.

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