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Characterizing decision-making and reward processing in bipolar disorder: A cluster analysis.

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  • 1Bipolar Disorder Unit, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain.

European Neuropsychopharmacology : the Journal of the European College of Neuropsychopharmacology
|May 30, 2018
PubMed
Summary

Bipolar patients exhibit distinct emotional decision-making profiles, with low punishment sensitivity linked to poorer cognitive and functional outcomes, even during remission. This research identifies three unique neurocognitive profiles in bipolar disorder (BP).

Keywords:
Bipolar disorderCluster analysisDecision-makingReward processingSensitivity to punishment

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Bipolar patients (BP) often show emotional decision-making and reward processing abnormalities, persisting even in remission.
  • Previous research identified distinct cognitive profiles in BP, but emotional decision-making and reward processing remain understudied.
  • Understanding these specific cognitive domains is crucial for a comprehensive view of bipolar disorder.

Purpose of the Study:

  • To investigate the existence of discrete neurocognitive profiles related to emotional decision-making and reward processing in euthymic bipolar patients.
  • To identify distinct performance patterns in emotional decision-making and reward processing within the bipolar population.

Main Methods:

  • A hierarchical clustering technique was employed on data from 126 euthymic bipolar patients.
  • Performance on the Iowa Gambling Task was used to define neurocognitive profiles.
  • Statistical comparisons (ANOVA, Chi-squared Test) were conducted between identified clusters.

Main Results:

  • Three distinct neurocognitive profiles were identified: poor decision ability, lowest punishment sensitivity, and best decision-making with highest punishment sensitivity.
  • The group with the lowest punishment sensitivity (Cluster 2) exhibited the most significant functional impairment.
  • This impaired group also showed poorer outcomes in attention, executive functions, and social cognition.

Conclusions:

  • This study confirms the existence of discrete cognitive profiles in emotional decision-making and reward processing for bipolar disorder patients, similar to 'cold' cognitive domains.
  • Low punishment sensitivity emerged as a key indicator potentially correlating with worse cognitive and functional outcomes in bipolar disorder.
  • These findings highlight the importance of assessing emotional decision-making and reward processing in understanding the heterogeneity of bipolar disorder.