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Reward processing and irritability in young adults.

Christen M Deveney1

  • 1Department of Psychology, Wellesley College, 106 Central Street, Wellesley, MA, 02481, USA.

Biological Psychology
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PubMed
Summary

This study found that higher trait irritability in young adult females is linked to altered brain responses to frustration, specifically smaller neural signals when experiencing losses. These findings suggest a connection between irritability and how the brain processes negative outcomes.

Keywords:
FRNFrustrative non-rewardIrritabilityRewPReward processing

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Area of Science:

  • Neuroscience
  • Psychology
  • Cognitive Science

Background:

  • Irritability is a common but understudied emotion in adults.
  • Previous research on irritability has primarily focused on pediatric populations.
  • Understanding irritability mechanisms in adults is crucial for mental health research.

Purpose of the Study:

  • To investigate the relationship between trait irritability, reward processing, and responses to frustrative non-reward in young adult females.
  • To adapt a pediatric paradigm for studying irritability in a non-clinical adult sample.
  • To examine electrophysiological correlates of reward and loss feedback in relation to trait irritability.

Main Methods:

  • A cohort of 58 non-clinical young adult females participated.
  • Participants completed tasks measuring trait irritability, reward responsivity, and responses to frustrative non-reward.
  • Electroencephalography (EEG) was used to record event-related potentials (ERPs), including the feedback-related negativity (FRN) and reward positivity (RewP).

Main Results:

  • Frustration manipulation successfully increased self-reported frustration and reduced task accuracy, mirroring findings in pediatric populations.
  • Higher trait irritability was correlated with diminished FRN amplitudes in response to loss feedback.
  • No significant associations were found between trait irritability and the FRN to reward feedback or the RewP.

Conclusions:

  • This study provides preliminary evidence that trait irritability in healthy young adult females is associated with altered neural processing of frustrative non-reward.
  • The findings suggest that aberrant responses to negative feedback may be a transdiagnostic feature of irritability.
  • Further research is warranted to explore these mechanisms in diverse adult populations and clinical contexts.