Hunger increases delay discounting of food and non-food rewards

Jordan Skrynka, Benjamin Vincent (Lead / Corresponding author)

Research output: Contribution to journalArticle

1 Citation (Scopus)
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Abstract

How do our valuation systems change to homeostatically correct undesirable psychological or physiological states, such as those caused by hunger? There is evidence that hunger increases discounting for food rewards, biasing choices towards smaller but sooner food reward over larger but later reward. However, it is not understood how hunger modulates delay discounting for non-food items. We outline and quantitatively evaluate six possible models of how our valuation systems modulate discounting of various commodities in the face of the undesirable state of being hungry. With a repeated-measures design, an experimental hunger manipulation, and quantitative modeling, we find strong evidence that hunger causes large increases in delay discounting for food, with an approximately 25% spillover effect to non-food commodities. The results provide evidence that in the face of hunger, our valuation systems increase discounting for commodities, which cannot achieve a desired state change as well as for those commodities that can. Given that strong delay discounting can cause negative outcomes in many non-food (consumer, investment, medical, or inter-personal) domains, the present findings suggest caution may be necessary when making decisions involving non-food outcomes while hungry.

Original languageEnglish
Pages (from-to)1729-1737
Number of pages9
JournalPsychonomic Bulletin & Review
Volume26
Issue number5
Early online date13 Sep 2019
DOIs
Publication statusPublished - Oct 2019

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Keywords

  • Delay discounting
  • Hunger
  • Inter-temporal choice
  • Valuation

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