Daily Habits & Consumer Preferences Study

Part of paid clinical trials in Los Angeles, California.

Sponsor
University of California, Los Angeles
Study ID
NCT05402137
Status
Completed

Conditions

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Accepted

Interventions

  • Weight stigma intervention — BEHAVIORAL
    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.

Study Details

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.

Key Dates

Start date
Apr 28, 2022
Status verified
Oct 2025
Primary completion
Aug 3, 2024
Completion
Aug 3, 2024

Study Design

Enrollment
330 participants (actual)
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE

Arms

  • Experimental: Experimental (Weight Stigma) Arm
    Participants undergoing the experimental (Weight Stigma) arm are exposed to an interaction partner (a trained confederate) who endorses anti-fat attitudes. Prior to their interaction, participants exchange a "Getting to Know You Questionnaire" with the confederate, where the confederate endorses anti-fat attitudes. During their interaction with the confederate, participants are told they will be completing consumer rating tasks with another participant in the study. During the ostensible consumer rating task, participants in the experimental condition rate items such as a diet magazine, body sunscreen, running shoes, and a size small T-shirt labeled as size large to bolster the weight stigma manipulation.
  • No Intervention: Control Arm
    Participants undergoing the control arm are also exposed to an interaction partner (a trained confederate) who does not endorse anti-fat attitudes. Prior to their interaction, participants exchange a "Getting to Know You Questionnaire" with the confederate; however, the confederate does not endorse anti-fat attitudes. During their interaction with the confederate, participants are told they will be completing consumer rating tasks with another participant in the study. During the ostensible consumer rating task, participants in the control condition rate items such as an interior design magazine, face sunscreen, regular (non-running) shoes, and a size large T-shirt correctly labeled as size large to avoid weight stigma.

Primary Outcome Measure

Hyperpalatable Food Intake [ Time Frame: Hyperpalatable food intake will be measured directly after the intervention, on average 10 minutes later. ]

Locations (1)

FacilityCityStateZIPSite coordinators
University of California, Los AngelesLos AngelesCalifornia90034-

Find similar trials in Los Angeles, CA

By condition
Obesity / overweight
By specialty
EndocrinologyMetabolic healthWeight loss
By research site
University of California, Los Angeles· Los Angeles, CA

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