Abstract
In this study, we assessed to what extent reasoning improves performance in decision making under risk in a laboratory gambling task (Game of Dice Task-Double, GDT-D). We also investigated to what degree individuals with above average mathematical competence decide better than those with average mathematical competence. Eighty-five participants performed the GDT-D and several numerical tasks. Forty-two individuals were asked to calculate the probabilities and the outcomes associated with the different options of the GDT-D before performing it. The other 43 individuals performed the GDT-D at the beginning of the test session. Both reasoning and mathematical competence had a positive effect on decision making. Different measures of mathematical competence correlated with advantageous performance in decision making. Results suggest that decision making under explicit risk conditions improves when individuals are encouraged to reflect about the contingencies of a decision situation. Interventions based on numerical reasoning may also be useful for patients with difficulties in decision making.
Notes
In the cups task, taking a risk is advantageous in some trials, while it is disadvantageous in some other trials.
Note that earlier studies report a normal distribution of GDT scores in the normal population. This was not the case in the present sample of highly educated participants.
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Acknowledgements
We would like to thank all participants for their contribution to the study as well as Franziska Foldenauer, Julia Horn, and Lisa-Marie Neier for their help with data collection. We also thank Prof. Matthias Brand for providing the GDT-D. This work is part of the first author’s (M.-T. P.) doctoral thesis and was supported by a fellowship granted by the “Vizerektorat für Forschung” of the Leopold Franzens University, Innsbruck, 2014/3/PSY-15. The second and corresponding author (L. Z.) receives research support from TWF-2010-1-993 and MUI-Start 2014-05-001.
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Handling editor: Don Ross (University of Cape Town); Reviewers: Matthias Brand (University of Duisburg-Essen), Edward Cokely (University of Oklahoma), Ellen Peters (Ohio State University).
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Pertl, MT., Zamarian, L. & Delazer, M. Reasoning and mathematical skills contribute to normatively superior decision making under risk: evidence from the game of dice task. Cogn Process 18, 249–260 (2017). https://doi.org/10.1007/s10339-017-0813-x
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DOI: https://doi.org/10.1007/s10339-017-0813-x