Alcohol Drinking
Conditions
Brief summary
This study evaluates within-person and between-person effects of a personalized normative feedback intervention and injunctive norms as they are altered by self-determination in heavy drinkers. Half of participants will receive personalized normative feedback and the other half will receive control feedback about media use habits.
Interventions
BEHAVIORALAlcohol-Specific Personalized Normative Feedback
Participants will receive personalized normative feedback about drinking.
BEHAVIORALSocial Media Personalized Normative Feedback
Participants will receive personalized normative feedback about social media use.
Sponsors
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
University of Houston
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)
Masking description
Participants will be assigned to and receive feedback via the computer. Once they have received feedback a research assistant will print this feedback for them to take home. At this time, research assistants will become unblinded to condition, but will not administer any new procedures other than answering participant questions.
Intervention model description
Half of participants will be randomly assigned to receive personalized normative feedback about their drinking. The other half will be randomly assigned to receive control feedback about social media use.
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Student at the University of Houston * Above 18 years of age * Heavy drinker (more than 4 drinks \[women\] or 5 drinks \[men\] on a single occasion in the last 2.5 weeks and drinks, on average, at least once per week.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Between-Person Self-Determination by PNF Interaction Predicting Consumption | 2-4 Weeks | A structural equation model will be fit with baseline consumption, self-determination, intervention condition, and the interaction between self-determination and condition predicting follow-up alcohol consumption. Consumption will be measured with the Alcohol Consumption Index, Quantity-Frequency-Peak Alcohol Use Index, and the Daily Drinking Questionnaire. These scales will be used as indicators of a single latent consumption variable. That latent consumption measure will be the outcome of interest. |
| Within-Person Self-Determination by PNF Interaction Predicting Consumption | 17 Days | A multilevel model will be fit with baseline consumption, daily self determination, intervention condition, and the interaction between condition and daily self-determination predicting daily alcohol consumption. Consumption will be measured as the number of drinks consumed the previous evening. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Between-Person Self-Determination by PNF Interaction Predicting Alcohol-Related Problems | 2-4 Weeks | A structural equation model will be fit with baseline consumption, alcohol-related problems, self-determination, intervention condition, and the interaction between self-determination and condition predicting follow-up alcohol-related problems. Alcohol-related problems will be measured with the Rutgers Alcohol Problems Index and the Young Adult Alcohol Consequences Questionnaire. Each of these problems measures will be split to form two indicators (for a total of four problems indicators) for an overall problems latent variable. This problems latent variable will then be used as the outcome of interest. |
| Within-Person Self-Determination by PNF Interaction Predicting Alcohol-Related Problems | 17 Days | A multilevel model will be fit with baseline consumption, daily self determination, intervention condition, and the interaction between condition and daily self-determination predicting daily alcohol alcohol-related problems. Alcohol-related problems will be measured with a checklist of non-overlapping items from the Rutgers Alcohol Problems Index and the Young Adult Alcohol Consequences Questionnaire. This combined checklist will be used to create the overall problems outcome of interest. |
Countries
United States
Outcome results
None listed