Journal of Gambling Studies

, Volume 32, Issue 1, pp 143–156

Betting on Illusory Patterns: Probability Matching in Habitual Gamblers

  • Wolfgang Gaissmaier
  • Andreas Wilke
  • Benjamin Scheibehenne
  • Paige McCanney
  • H. Clark Barrett
Original Paper

Abstract

Why do people gamble? A large body of research suggests that cognitive distortions play an important role in pathological gambling. Many of these distortions are specific cases of a more general misperception of randomness, specifically of an illusory perception of patterns in random sequences. In this article, we provide further evidence for the assumption that gamblers are particularly prone to perceiving illusory patterns. In particular, we compared habitual gamblers to a matched sample of community members with regard to how much they exhibit the choice anomaly ‘probability matching’. Probability matching describes the tendency to match response proportions to outcome probabilities when predicting binary outcomes. It leads to a lower expected accuracy than the maximizing strategy of predicting the most likely event on each trial. Previous research has shown that an illusory perception of patterns in random sequences fuels probability matching. So does impulsivity, which is also reported to be higher in gamblers. We therefore hypothesized that gamblers will exhibit more probability matching than non-gamblers, which was confirmed in a controlled laboratory experiment. Additionally, gamblers scored much lower than community members on the cognitive reflection task, which indicates higher impulsivity. This difference could account for the difference in probability matching between the samples. These results suggest that gamblers are more willing to bet impulsively on perceived illusory patterns.

Keywords

Gambling disorder Pathological gambling Probability matching Cognitive reflection task Misperception of randomness 

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Wolfgang Gaissmaier
    • 1
  • Andreas Wilke
    • 2
  • Benjamin Scheibehenne
    • 3
  • Paige McCanney
    • 2
  • H. Clark Barrett
    • 4
  1. 1.Department of Psychology, Social Psychology and Decision SciencesUniversity of KonstanzKonstanzGermany
  2. 2.Department of PsychologyClarkson UniversityPotsdamUSA
  3. 3.Department of Economic PsychologyUniversity of BaselBaselSwitzerland
  4. 4.Department of AnthropologyUniversity of California at Los AngelesLos AngelesUSA

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