Betting on Illusory Patterns : Probability Matching in Habitual Gamblers

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2016
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Wilke, Andreas
Scheibehenne, Benjamin
McCanney, Paige
Barrett, H. Clark
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Journal of Gambling Studies ; 32 (2016), 1. - S. 143-156. - eISSN 1573-3602
Zusammenfassung
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.
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150 Psychologie
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Gambling disorder, Pathological gambling, Probability matching, Cognitive reflection task, Misperception of randomness
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Zitieren
ISO 690GAISSMAIER, Wolfgang, Andreas WILKE, Benjamin SCHEIBEHENNE, Paige MCCANNEY, H. Clark BARRETT, 2016. Betting on Illusory Patterns : Probability Matching in Habitual Gamblers. In: Journal of Gambling Studies. 32(1), pp. 143-156. eISSN 1573-3602. Available under: doi: 10.1007/s10899-015-9539-9
BibTex
@article{Gaissmaier2016-03Betti-31571,
  year={2016},
  doi={10.1007/s10899-015-9539-9},
  title={Betting on Illusory Patterns : Probability Matching in Habitual Gamblers},
  number={1},
  volume={32},
  journal={Journal of Gambling Studies},
  pages={143--156},
  author={Gaissmaier, Wolfgang and Wilke, Andreas and Scheibehenne, Benjamin and McCanney, Paige and Barrett, H. Clark}
}
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