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Measuring Delay Discounting in Humans Using an Adjusting Amount Task
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Using crowdsourcing to examine relations between delay and probability discounting.

David P Jarmolowicz1, Warren K Bickel, Anne E Carter

  • 1Department of Applied Behavioral Science, University of Kansas, 1000 Sunnyside Ave., Lawrence, KS 66044, United States. dpj@ku.edu

Behavioural Processes
|September 18, 2012
PubMed
Summary
This summary is machine-generated.

This study investigated the relationship between delay discounting and probability discounting in 904 internet users. Findings indicate a small but significant positive correlation, suggesting they are related but distinct decision-making processes.

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Area of Science:

  • Behavioral Economics
  • Cognitive Psychology
  • Decision Science

Background:

  • Understanding human decision-making is crucial, with extensive research on delay and probability discounting.
  • The precise relationship between delay discounting and probability discounting remains unclear, with conflicting findings in prior studies.

Purpose of the Study:

  • To clarify the relationship between delay discounting and probability discounting.
  • To examine these discounting behaviors in a large online sample.
  • To validate findings using established relationships, such as with smoking status.

Main Methods:

  • Recruited 904 participants via Amazon Mechanical Turk (AMT).
  • Assessed delay and probability discounting rates.
  • Performed principal component analysis to determine underlying constructs.
  • Validated data collection methods by replicating known associations.

Main Results:

  • A small, statistically significant positive correlation was found between delay and probability discounting rates.
  • Principal component analysis supported two distinct components underlying discounting behaviors, not one.
  • Replication of established relations, like between delay discounting and smoking, validated the AMT data.

Conclusions:

  • Delay and probability discounting are related but not identical constructs.
  • These findings suggest that impulsivity may not solely explain both discounting phenomena.
  • The study provides empirical evidence differentiating these two key aspects of decision-making.