NCT05402137

Daily Habits & Consumer Preferences Study

Obesity Stigma and Health Behavior: An Experimental Approach

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 330 (actual)
• Sponsor: University of California, Los Angeles · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The study will use a between-subjects design in a sample of individuals with BMI greater than or equal to 28 from the Los Angeles community (N=330). Participants will be randomly assigned to a weight stigma vs. control manipulation. Changes to the following health behaviors will be subsequently measured in their everyday lives: 3-day diet as captured by ecological momentary assessment (EMA) food diaries, objectively measured eating of obesogenic foods, objectively measured physical activity captured by 24-hour actigraphy, and sleep, captured objectively by overnight actigraphy and subjectively self-reported sleep measures. The investigators hypothesize that weight stigma causes decrements in health behaviors (e.g., sleep, eating, and physical activity) in everyday life.

Conditions

• Obesity

Interventions

Type	Name	Description
BEHAVIORAL	Weight stigma intervention	Those undergoing the weight stigma manipulation will be exposed to an interaction partner (a trained confederate) who will endorse anti-fat attitudes. The purpose of this interaction is to examine the causal effects of weight stigma on eating behaviors, physical activity, and sleep.

Timeline

• Start date: 2022-04-28
• Primary completion: 2024-08-03
• Completion: 2024-08-03
• First posted: 2022-06-02
• Last updated: 2026-01-20
• Results posted: 2026-01-20

Locations

1 site across 1 country: United States