Inhibitory Control Adult Weight Management

Study Overview
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Brief Summary
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The purpose of this pilot study is to explore the benefits of supplementing the WW (formerly Weight Watchers) online program with a cognitive training game (PolyRules!) among adults with overweight or obesity.

Official Title
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Supplementing Evidence-based Commercial Weight Management Program With Inhibitory Control Training: a Pilot Study

Conditions
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Overweight and Obesity

Intervention / Treatment
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* Behavioral: WW Only
* Behavioral: WW + PolyRules!


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18 years of age or older Read, write and speak English with acceptable visual acuity BMI between 25-40 kg/m^2 Exclusion Criteria: Currently enrolled in weight loss interventions or undergoing bariatric surgery Pregnant women Individuals with severe cognitive delays or visual/hearing impairment

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: WW Only<br>Participants will receive 3-month access to the WW digital program. | Behavioral: WW Only<br>* WW is a structured behavioral weight management program that focuses on diet, physical activity and mindset skills. The dietary approach is based on creating an energy deficit diet to produce weight loss while also being attentive to the quality of the calories. Specifically, the WW program assigns SmartPoints values to foods based on calories, sugar, saturated fat and protein. In addition, particular foods are assigned a points value of zero (0) to encourage a healthier eating pattern (e.g. fruits, vegetables, non-fat yogurt, fish).<br>|
| Experimental: WW + PolyRules!<br>Participants will receive 3-month access to the WW digital program and the PolyRules! app. | Behavioral: WW + PolyRules!<br>* In addition to WW, participants will be asked to engage in daily cognitive training using the PolyRules! app for three months. They will be instructed to start with 20-min of daily cognitive training and to progressively increase their training time to 30-min.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in BMI from baseline to 3 months to yield effect size | BMI will be calculated by aggregating participants' self-reported height in meters and weight in kilograms at baseline and at 3 months. Throughout the study, participants will be asked to self-report their weight through the WW (formerly Weight Watchers) online app. This data will be used to calculate change in BMI. | Baseline, 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To explore whether inhibitory control training confers any benefits in self-reported diet | Diet quality will be assessed using participant's self-reported food intake through the WW (formerly Weight Watchers) online app. This data will be leveraged to assess changes in adherence to dietary guidelines for fruits and vegetables, servings of whole grains, red/processed meats, alcoholic beverages and food/beverages with added sugars. | Baseline, 3 months | 
| To explore whether inhibitory control training confers any increases in self-reported physical activity. | Physical activity will be assessed using participant's self-reported physical activity levels through the WW (formerly Weight Watchers) online app. This data will be leveraged to assess changes in engagement in energy balance behaviors by capturing information on the type, duration and intensity of activity. | Baseline, 3 months | 
| Change in performance on the cancellation task. | Attention and inhibitory control will be assessed using participant's change in performance on the cancellation task. Performance will be measured by summing up the total number of errors committed within a specific time frame, such that lower scores are more favorable. | Baseline, 3 months | 
| Change in performance on the countermanding task. | Attention and inhibitory control will also be assessed using participant's change in performance on the countermanding task. Performance will be measured by summing the number of accurate responses within a 15 second timeframe, such that higher scores are more favorable. | Baseline, 3 months | 
| Change in performance on the N-back task. | Change in working memory will be assessed using participant's performance on the N-back task. Performance will be measured by looking at the number of errors such that more errors is a worse outcome. | Baseline, 3 months | 
| Change in performance on the letter-number task. | Change in working memory will also be assessed using participant's performance on the letter-number task. Performance will be measured by looking at error rates, such that higher error rates are worse outcomes. | Baseline, 3 months | 
| Change in visuo-spatial working memory based on performance on the Corsi task. | Change in visuo-spatial working memory will be assessed by participant's performance on the Corsi tasks. Performance will be measured by assessing the number of correct sequences, such that a larger number of correct sequences is a more favorable outcomes. | Baseline, 3 months |