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Related Concept Videos

The Influence of Affect on Cognition01:29

The Influence of Affect on Cognition

332
Positive affect significantly influences cognitive processes, including evaluation, memory, creativity, and social judgments. Compared to negative affect, positive emotional states promote more favorable interpretations of stimuli, cognitive flexibility, and heuristic processing. These effects highlight emotions' powerful role in shaping how individuals perceive, remember, and interact with the world.Influence on Evaluation and AttributionWhen individuals experience positive affect, they are...
332

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Positive affect increases aperiodic brain activity.

Xiaolei Xu1, Xianyun Zhu1, Meiyun Jiang1

  • 1Shandong Provincial Key Laboratory of Brain Science and Mental Health, Faculty of Psychology, Shandong Normal University, No. 88 East Wenhua Road, Jinan, Shandong, 250014, China.

Psychological Research
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Summary

Affective valence influences brain activity. Processing positive stimuli, compared to neutral or negative ones, increases aperiodic neural activity, particularly when emotional valence is consistent over trials.

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Area of Science:

  • Cognitive Neuroscience
  • Affective Neuroscience
  • Computational Neuroscience

Background:

  • Metacontrol, the ability to balance persistence and flexibility, is crucial for adaptive behavior.
  • Cortical noise, measured by the aperiodic exponent of neural activity, is implicated in metacontrol.
  • Behavioral studies suggest a link between affect and metacontrol, prompting investigation into their neural underpinnings.

Purpose of the Study:

  • To investigate whether affective valence systematically alters aperiodic neural activity.
  • To examine the relationship between processing affective facial expressions and the aperiodic exponent during a cognitive task.

Main Methods:

  • Analysis of aperiodic neural activity using the aperiodic exponent.
  • Participants performed a 2-back task involving presentation of negative, neutral, and positive facial expressions.
  • Data were analyzed from two independent datasets, with a specific focus on blocked valence conditions.

Main Results:

  • Whole-brain aperiodic activity was significantly higher for positive facial expressions compared to neutral and negative faces.
  • This effect was observed specifically when affective valence was blocked (consistent over consecutive trials).
  • The observed differences in aperiodic activity were widespread, including frontal, parietal, temporal, and occipital regions.

Conclusions:

  • Aperiodic neural activity is modulated by affective valence.
  • Processing positive stimuli leads to increased aperiodic activity compared to neutral or negative stimuli.
  • These findings highlight the interplay between affect and neural dynamics underlying cognitive control.