Humans Can Adopt Optimal Discounting Strategy under Real-Time Constraints
Author Information
Author(s): Schweighofer N, Shishida K, Han C. E, Okamoto Y, Tanaka S. C, Yamawaki S, Doya K
Primary Institution: University of Southern California
Hypothesis
In situations of repeated forced choices with varying delays to rewards, a discounting strategy that values rewards with longer delays less than hyperbolic discounting would maximize total gain.
Conclusion
The study found that most subjects adopted exponential discounting, which maximized their total reward gain in a decision-making task.
Supporting Evidence
- Most subjects adopted exponential discounting in the experiment.
- The average indifference line was much closer to that of an exponential model than a hyperbolic model.
- Exponential discounting maximized total reward gain in the task.
- Fourteen out of twenty subjects exhibited pure exponential discounting.
- Subjects gained an average of 1840 yen, indicating effective decision-making.
Takeaway
When choosing between rewards, people can be smart and pick the option that gives them the most money in the long run, even if it means waiting a little longer.
Methodology
Subjects chose between a smaller immediate reward and a larger delayed reward in a task designed to mimic animal foraging, with varying experienced delays.
Potential Biases
Potential bias due to the exclusion of subjects based on specific criteria, which may not represent the general population.
Limitations
The study only included male subjects, which may limit the generalizability of the findings.
Participant Demographics
Twenty healthy, right-handed male volunteers with no history of psychiatric or neurological disorders.
Statistical Information
P-Value
p<0.005
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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