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Related Experiment Video

Updated: Feb 8, 2026

Measuring Delay Discounting in Humans Using an Adjusting Amount Task
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Naps Do Not Change Delay Discounting Behavior in Young Adults.

Sean O'Connor1, Akshata Sonni2, Uma Karmarkar3

  • 1Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, MA, United States.

Frontiers in Psychology
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Summary

A mid-day nap did not change how young adults discount future rewards, despite sleep

Keywords:
decision makingdiscountingeconomicsimpulsivitynapssleep

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Area of Science:

  • Neuroscience
  • Decision-making
  • Sleep research

Background:

  • Delayed discounting, or preferring smaller immediate rewards over larger future ones, is linked to impulsivity and addiction.
  • Sleep influences decision-making, prompting investigation into its effect on discounting behavior.

Purpose of the Study:

  • To test if sleep reduces delayed discounting behavior.
  • To examine the impact of a mid-day nap versus a wake interval on financial decision-making.

Main Methods:

  • Twenty young adults completed a hypothetical delay discounting task before and after a mid-day nap or an equivalent wake interval.
  • Participants chose between immediate rewards and a larger reward at varying future delays (2–22 weeks).
  • A within-subject, counterbalanced design was used, with conditions separated by one week.

Main Results:

  • Indifference points decreased with longer delays, consistent with discounting.
  • No significant difference was found in the impact of a nap versus a wake interval on discounting behavior.
  • The study did not find that a nap is sufficient to alter delay discounting.

Conclusions:

  • While sleep plays a role in some financial decisions, a brief nap does not appear to modify delay discounting.
  • Further research is needed to understand the relationship between sleep and financial decision-making, particularly concerning impulsivity.