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Hypersensitivity to reward in problem gamblers.

Johannes Hewig1, Nora Kretschmer, Ralf H Trippe

  • 1Institute of Psychology, Friedrich-Schiller-University Jena, Jena, Germany. hewig@biopsy.uni-jena.de

Biological Psychiatry
|January 2, 2010
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Summary
This summary is machine-generated.

Problem gamblers exhibit high-risk taking behavior in Black Jack, choosing to hit more often even after losses. This behavior is linked to enhanced reward-related neural responses, suggesting a neurobiological basis for gambling addiction.

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Area of Science:

  • Neuroscience
  • Behavioral Psychology
  • Addiction Research

Background:

  • Pathological gambling research is exploring its neurophysiologic underpinnings.
  • Limited data exists on behavioral deficits and neurofunctional deviations in realistic gambling scenarios like Black Jack.

Purpose of the Study:

  • To investigate the neurophysiologic basis of pathological gambling.
  • To examine behavioral and neurofunctional differences in problem gamblers during Black Jack.

Main Methods:

  • Electroencephalogram (EEG) recorded from 20 problem gamblers and 21 controls playing computerized Black Jack.
  • Participants decided to 'hit' or 'sit' at specific point scores to optimize their hand without exceeding 21.

Main Results:

  • Problem gamblers were more prone to 'hit' at a score of 16, even after prior losses, unlike controls who preferred to 'sit'.
  • Problem gamblers displayed heightened reward-related positive amplitudes in event-related potentials following successful 'hit' decisions at 16.

Conclusions:

  • Experimental evidence confirms high-risk taking behavior in gamblers and its neural correlates.
  • Problem gambling is associated with an amplified neural reward response to infrequent successes of risky decisions.