Incentives, Overweight and Obesity, Physical Activity
Conditions
Keywords
overweight, obesity, physical activity, exercise
Brief summary
This research seeks to examine psychological factors that may impact relationship between incentives and health behavior engagement, specifically physical activity. Additionally, it will compare the impact of two different incentive schedules on behavior engagement, one providing immediate rewards (i.e. rewards received on a daily basis) and another providing delayed rewards (i.e. rewards received at the end of the study period), with an active self-monitoring intervention condition in which no rewards are offered. Study participants will provide reports of their physical activity each day for three weeks, and in the two incentive conditions, they will receive small monetary rewards for their physical activity. Following the three week reporting and reward period, participants will complete two additional assessments, measuring psychological constructs and behavior engagement following the cessation of rewards. The study will also examine how cognitive and anthropomorphic factors may contribute to intervention response and the effects on psychological constructs.
Interventions
BEHAVIORALself-monitoring
self-monitoring of physical activity
BEHAVIORALdaily incentives
daily incentive payments for physical activity
BEHAVIORALdelayed lump sum incentives
delayed lump sum payments for physical activity
Sponsors
University of Colorado, Boulder
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Complete less than 150 minutes of moderate-vigorous physical activity weekly * Daily access to the internet for 3 weeks following baseline research visit * Have or are willing to create an account on PayPal * Willing to wear a heart rate monitor watch during physical activity for 3 weeks * BMI greater than or equal to 25, from self-reported height and weight
Exclusion criteria
* Diagnosis of cardiovascular, metabolic, or renal disease
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Moderate-vigorous physical activity minutes | Week 3 | summed minutes of weekly moderate intensity physical activity & vigorous intensity physical activity |
| Self-Efficacy for physical activity | Week 3 | 8-item self-report scale measuring self-efficacy (Social Cognitive Theory, Bandura, 1977; also called perceived behavioral control, Theory of Planned Behavior, Ajzen, 1985); scores are a mean of 8 items, scored 1-7 with higher scores indicative of greater self-efficacy |
| Attitudes toward physical activity | Week 3 | 12-item self-report scale (Theory of Planned Behavior, Ajzen, 1985); scores are a mean of 12 items scored from -5 to +5, with higher scores indicative of more positive attitudes |
Countries
United States
Outcome results
None listed