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Related Experiment Video

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A Conflict Model of Reward-seeking Behavior in Male Rats
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Shifted risk preferences in pathological gambling.

R Ligneul1, G Sescousse, G Barbalat

  • 1Reward and Decision-Making Group, Cognitive Neuroscience Center, CNRS, Bron, France, University of Lyon I.

Psychological Medicine
|August 31, 2012
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Summary

Pathological gamblers exhibit economic preferences shifted towards risk, not distorted probability weighting. This finding suggests a potential clinical application for a new decision-making task in assessing gambling severity.

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Area of Science:

  • Behavioral economics
  • Neuroeconomics
  • Psychiatry

Background:

  • Pathological gambling (PG) is an impulse control disorder marked by excessive risk-seeking despite negative outcomes.
  • Behavioral economics provides a framework to analyze risk-taking in PG.
  • Two hypotheses were tested: probability distortion vs. global overweighting of risk.

Purpose of the Study:

  • To investigate the nature of risk-taking behavior in pathological gamblers using behavioral economics.
  • To differentiate between probability distortion and global risk-preference shifts in PG.

Main Methods:

  • A decision-making task involving choices between safe amounts and risky gambles was administered.
  • Certainty equivalents were computed based on participants' choices.
  • Behavioral data were fitted using a probability weighting function to analyze risk preferences.

Main Results:

  • Results supported the hypothesis that pathological gamblers exhibit a global shift towards risk, rather than distorted probability weighting.
  • An 'elevation parameter' correlated with gambling severity in pathological gamblers and affinity in controls.

Conclusions:

  • Pathological gambling is associated with a probability-independent shift towards risky options in economic preferences.
  • The 'certainty equivalent' task shows potential clinical relevance for assessing gambling severity.