title: Using crowdsourcing to examine relations between delay and probability discounting.
abstract: Although the extensive lines of research on delay and/or probability discounting have greatly expanded our understanding of human decision-making processes, the relation between these two phenomena remains unclear. For example, some studies have reported robust associations between delay and probability discounting, whereas others have failed to demonstrate a consistent relation between the two. The current study sought to clarify this relation by examining the relation between delay and probability discounting in a large sample of internet users (n=904) using the Amazon Mechanical Turk (AMT) crowdsourcing service. Because AMT is a novel data collection platform, the findings were validated through the replication of a number of previously established relations (e.g., relations between delay discounting and cigarette smoking status). A small but highly significant positive correlation between delay and probability discounting rates was obtained, and principal component analysis suggested that two (rather than one) components were preferable to account for the variance in both delay and probability discounting. Taken together, these findings suggest that delay and probability discounting may be related, but are not manifestations of a single construct (e.g., impulsivity).
authors.affiliation: Department of Applied Behavioral Science, University of Kansas, 1000 Sunnyside Ave., Lawrence, KS 66044, United States. dpj@ku.edu
authors.forename: David P
authors.initials: DP
authors.lastname: Jarmolowicz
authors.forename: Warren K
authors.initials: WK
authors.lastname: Bickel
authors.forename: Anne E
authors.initials: AE
authors.lastname: Carter
authors.forename: Christopher T
authors.initials: CT
authors.lastname: Franck
authors.forename: E Terry
authors.initials: ET
authors.lastname: Mueller
mesh_terms: D000328:Adult; D002755:Choice Behavior; D063045:Crowdsourcing / Q000379:methods*; D003627:Data Interpretation, Statistical; D003657:Decision Making / Q000502:physiology*; D004522:Educational Status; D005260:Female; D006801:Humans; D007182:Income; D007360:Intelligence; D008297:Male; D025341:Principal Component Analysis; D011336:Probability; D011597:Psychomotor Performance / Q000502:physiology; D015203:Reproducibility of Results; D012727:Sex Characteristics; D011795:Surveys and Questionnaires