NDOPSYCHO
Runnable course lab

Decision and vignette-design lab

A 45-minute class using delay discounting and randomized vignettes to teach choice design, random assignment, manipulation checks, and outcome ratings.

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Preparation

Complete these checks before sharing participant links.

  • Review the amounts and delays used in the choice task.
  • Use neutral, low-risk vignette content for the class exercise.
  • Confirm the manipulation-check item matches the assigned condition.

Class flow

The complete plan uses 45 minutes.

  • 7 min · Design: Identify choice attributes, conditions, and outcome variables.
  • 13 min · Run tasks: Complete both templates and record the assigned vignette condition.
  • 10 min · Check assignment: Count condition assignment and review the manipulation check.
  • 10 min · Compare outcomes: Summarize choices and ratings with the stated analysis unit.
  • 5 min · Debrief: List design limits and claims the data cannot support.

Data and analysis

Core fields: immediate_amount, delayed_amount, delay_days, choice, condition, vignette_id, scale_value, manipulation_check, rt.

  • How does the share of delayed choices change with delay length?
  • Were vignette conditions assigned at similar rates?
  • Did the manipulation check separate conditions before the outcome comparison?

Course materials and experiment templates

FAQ

How long does the class take?

The plan allocates 45 minutes for the question, task run, data inspection, analysis, and discussion.

Which files can I download?

The teacher plan is provided as Markdown and the analysis worksheet as UTF-8 CSV.

Which data should students use?

The shared fields include immediate_amount, delayed_amount, delay_days, choice, condition, vignette_id. Each task page lists its complete data dictionary.

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