An interventional study of Default Veg and Default Meat in Choice Behavior and Dietary Habits, sponsored by Arizona State University. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-07-15.
Sponsored by Arizona State University · Not applicable, Interventional, and Treatment
In this study, participants at six different academic events were randomly assigned to one of two conditions: (1) a default meat group, where the default choice was a meal with meat and participants had the option of opting out and choosing a plant-based meal; and (2) a default veg group, where the default choice was a plant-based meal with the option of opting out and choosing a meal with meat. Based on the success of prior studies that implemented plant-based defaults through preselection, we hypothesized that more participants would choose the plant-based meal when that option was set as the default, and we hypothesized that the default intervention would be equally effective across academic institutions. We also hypothesized that the default intervention would be equally effective across demographic groups, which would help to further demonstrate the generalizability of our plant-based default intervention.
218 studies on the registry are indexed under Feeding Behavior; 95 are open to participants now.
This study's enrollment of 365 is above the median of 75 across 161 interventional studies indexed under Feeding Behavior.
Browse Feeding Behavior studies →Arizona State University is the lead sponsor of 234 studies on the registry; 41 are open to participants now.
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Exclusion Criteria:
Received a plant-based meal as the default option on the event RSVP form that required participants to pre-select their meal choice
Behavioral: Default Veg
Received a meal with meat as the default option on the event RSVP form that required participants to pre-select their meal choice
Behavioral: Default Meat
Received a plant-based meal as the default option on the event RSVP form that required participants to pre-select their meal choice
Received a meal with meat as the default option on the event RSVP form that required participants to pre-select their meal choice
Proportion of participants selecting the plant-based meal
The percent (%) of participants selecting the plant-based meal option instead of the meal with meat option on the event RSVP from
Time frame: Immediately during the completion of the event RSVP form
Plan to share: Yes — De-identified study will be share through the ASU Research Data Repository
Supporting information: Csr, Analytic code
This study is completed, as verified in Jul 2025. You cannot join it, but the record below documents what was studied.
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Arizona State University