Influence of Facebook Ads on Food Choice

Study Overview
=================
Brief Summary
-----------------
This is a randomized trial to examine the influence of race-congruent food marketing on social media among Black and White adolescents.

Detailed Description
-----------------
The overall objective of our three studies is to identify the extent to which exposure to Facebook food ads increases the number of calories purchased and consumed by Black and White adolescents. Guided by strong preliminary data, the study team will test three aims: 1)To evaluate the extent to which exposure to racially congruent vs. incongruent Facebook food ads causes Black vs. White adolescents to purchase more calories for a snack; 2)To determine the extent to which exposure to many vs. few likes on Facebook food ads causes Black and White adolescents to purchase more calories for a snack; and 3)To test the degree to which visual attention to unhealthy foods, racially congruent people, and/or likes in Facebook ads explains the relationship between ad exposure and calorie intake.

Official Title
-----------------
Examining Influence of Facebook Ads on Black and White Adolescents' Food Choices

Conditions
-----------------
Food Choices

Intervention / Treatment
-----------------
* Behavioral: Racially Congruent Ads
* Behavioral: Racially Incongruent Ads


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: adolescent (13-17 years of age) who identifies as only non-Latino White or only Black/African American who logs into Facebook once daily who can read and speak English Exclusion Criteria: participants who do not meet all criteria described above.

Ages Eligible for Study
-----------------
Minimum Age: 13 Years
Maximum Age: 17 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Factorial Assignment
Interventional Model Description: The intervention is exposure to Facebook food ads that are either race congruent or race incongruent, and that have varying numbers of likes.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Condition 1: Race Congruent Ads<br>Participants will complete a 15-minute survey in which they will be randomized to view and rate Facebook food ads associated with their condition. Then they will complete a food purchasing task in which they will shop in an online store that will display six food items and six beverages. Finally, they will answer demographic questions (e.g., self-reported height and weight) and view a debriefing summary that describes the full purpose of the study. | Behavioral: Racially Congruent Ads<br>* Facebook food ads that are racially congruent.<br>|
| Experimental: Condition 2: Race Incongruent Ads<br>Participants will complete a 15-minute survey in which they will be randomized to view and rate Facebook food ads associated with their condition. Then they will complete a food purchasing task in which they will shop in an online store that will display six food items and six beverages. Finally, they will answer demographic questions (e.g., self-reported height and weight) and view a debriefing summary that describes the full purpose of the study. | Behavioral: Racially Incongruent Ads<br>* Facebook food ads that are racially incongruent.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Calories Purchased |  | 15 minutes | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Attitude Toward Ad | Attitude will be reported on a Likert scale of 1 to 100 (1 = likeable, 100 = unlikeable). The higher the score, the less likeable the ad is to the participant. | 15 minutes | 
| Time Spent Viewing Ad |  | 15 minutes |