Decision Making on Food Choices

Last registered on January 08, 2022


Trial Information

General Information

Decision Making on Food Choices
Initial registration date
October 21, 2019

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
October 22, 2019, 11:14 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Last updated
January 08, 2022, 1:16 AM EST

Last updated is the most recent time when changes to the trial's registration were published.


Primary Investigator

Claremont Graduate University

Other Primary Investigator(s)

PI Affiliation
Australia National University
PI Affiliation
Pomona College

Additional Trial Information

Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
See attachment
External Link(s)

Registration Citation

Huet-Vaughn, Emiliano, Joshua Tasoff and Eva Vivalt. 2022. "Decision Making on Food Choices." AEA RCT Registry. January 08.
Experimental Details


This is a lab experiment.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
See uploaded document
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
See uploaded document
Experimental Design Details
Randomization Method
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
Our original plan was 500 individuals if funds permit.

Data collection began in roughly Jan 2020. We ran about 80 subjects when the global pandemic temporarily shut down our data collection from March of 2020 to Aug 2021. In Sep 2021 we resumed running experiments but our subject pool was depleted. At great cost of time and money we conducted a massive recruitment effort. By Dec 2021 we had approximately N=300. We have not analyzed the data.

Our new target N is 400 as 500 is no longer feasible. Even as I write this the omicron wave is surging and has caused the Claremont Colleges, where we are running the experiment, to go entirely online for the first 2 weeks of the semester. We will try to collect N=400 after we return to campus in Feb 2022, but if future access to campus or to the subject pool yields less than 20 subjects per week we judge that the administrative burden and cost of time to be too high and we will end data collection with the sample that we have at that time.
Sample size: planned number of observations
see above
Sample size (or number of clusters) by treatment arms
see above
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Claremont Graduate University
IRB Approval Date
IRB Approval Number
Exempt #3555
Analysis Plan

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Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials