Related Experiment Video
Updated: May 8, 2026

Measuring Delay Discounting in Humans Using an Adjusting Amount Task
Published on: January 9, 2016
Reviewing and piloting methods for decreasing discount rates; someone, somewhere in time
Mehraj B Y Parouty1, Daan G M Krooshof, Tjalke A Westra
1Unit of PharmacoEpidemiology & PharmacoEconomics, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands.
This study explored time preferences for money and health gains among Dutch students. Findings indicate a negative relationship between delay time and discounting rate variance, informing future economic evaluations.
Area of Science:
- Health Economics
- Decision Science
- Behavioral Economics
Background:
- Economic evaluations often use discounting to value future outcomes.
- Debate exists on whether discounting rates should differ for monetary versus health gains.
- Eliciting time preferences is crucial for understanding discounting needs.
Purpose of the Study:
- To review existing methods for eliciting time preferences for monetary and health gains.
- To pilot these methods using a survey on Dutch university students.
- To investigate the perceived time preference for money and health outcomes.
Main Methods:
- Pilot survey administered to a convenience sample of Dutch university students.
- Utilized functional forms previously suggested for time preference elicitation.
- Developed a specific questionnaire for this purpose.
Main Results:
- Observed a negative relationship between the time of delay and the variance of the discounting rate across all models.
- Pilot study provided insights into questionnaire wording and interpretation.
- Identified potential scope and analytic frameworks for larger investigations.
Conclusions:
- The pilot study successfully piloted methods for eliciting time preferences.
- Findings suggest a consistent pattern in how delay affects discounting variance.
- Results lay groundwork for a large-scale population-based study on time preferences in economic evaluations.
Related Concept Videos
Methods of Medium Optimization
First Derivative Test: Problem Solving
The Anchoring-and-Adjustment Heuristic
Downsampling
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
Decreasing Function
Decision Making: P-value Method
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim is also stated. These statements can act as null and alternative hypotheses: a null hypothesis would be a neutral statement while the alternative hypothesis can have a...

