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ERIC Number: EJ1049839
Record Type: Journal
Publication Date: 2015-Jan
Pages: 15
Abstractor: As Provided
Reference Count: 39
ISBN: N/A
ISSN: ISSN-0278-7393
Discounting of Monetary Rewards That Are Both Delayed and Probabilistic: Delay and Probability Combine Multiplicatively, Not Additively
Vanderveldt, Ariana; Green, Leonard; Myerson, Joel
Journal of Experimental Psychology: Learning, Memory, and Cognition, v41 n1 p148-162 Jan 2015
The value of an outcome is affected both by the delay until its receipt (delay discounting) and by the likelihood of its receipt (probability discounting). Despite being well-described by the same hyperboloid function, delay and probability discounting involve fundamentally different processes, as revealed, for example, by the differential effects of reward amount. Previous research has focused on the discounting of delayed and probabilistic rewards separately, with little research examining more complex situations in which rewards are both delayed and probabilistic. In 2 experiments, participants made choices between smaller rewards that were both immediate and certain and larger rewards that were both delayed and probabilistic. Analyses revealed significant interactions between delay and probability factors inconsistent with an additive model. In contrast, a hyperboloid discounting model in which delay and probability were combined multiplicatively provided an excellent fit to the data. These results suggest that the hyperboloid is a good descriptor of decision making in complicated monetary choice situations like those people encounter in everyday life.
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A