Thank you for your interest in using DEEP! Please consider the following information before submitting your request.
Forms There are two ways of executing DEEP for research: - Qualtrics: this is best for stand alone DEEP studies.
- PHP: this is great for integrating DEEP within a study with several different tasks and surveys.
Version Within each form, there are two different versions of DEEP you can use depending on your needs: - Time Preference or Quasi-Hyperbolic Time Discounting
- Lower β = Stronger present bias
- Higher r (delta) = Higher discounting rate (daily)
- Click Here for a demo of the DEEP time
- Risk Preference
- Higher α = Less probability transformation
- Lower σ = More curvature in the value/utility function (linear utility σ=1)
- Higher λ = Higher Loss aversion
- Click Here for a demo of the DEEP Risk
For both versions of DEEP, the time will vary from a few to several minutes depending on the number of questions. The Legacy version uses PHP, and this can range from 4 to 20 questions, but it must be an even number.
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