Understanding Mechanisms of Health Behavior Change


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This study is currently recruiting participants.

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Verified June 2017 by University of Colorado, Boulder

Sponsor:

Information provided by (Responsible Party):

University of Colorado, Boulder

ClinicalTrials.gov Identifier:

NCT03192254

First received: June 16, 2017

Last updated: June 16, 2017

Last verified: June 2017

This research seeks to examine psychological factors that may impact relationship between incentives and health behavior engagement, specifically fruit and vegetable consumption. 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 a control condition in which no rewards are offered. Study participants will provide reports of their fruit and vegetable consumption each day for three weeks, and in the two incentive conditions, they will receive small monetary rewards for their fruit and vegetable consumption. 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.

Overweight and Obesity Diet Modification Incentives Behavioral: self-monitoring Behavioral: monetary incentives

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Participant
Primary Purpose: Basic Science
Official Title: Understanding Mechanisms of Health Behavior Change

Primary Outcome Measures:

  • Fruit and vegetable consumption, servings per week [ Time Frame: 3 Weeks ]
  • Fruit and vegetable consumption, servings per week [ Time Frame: 5 Weeks ]
  • Perceived behavioral control scale score [ Time Frame: 3 Weeks ]
  • Perceived behavioral control scale score [ Time Frame: 5 Weeks ]
  • Attitude scale score [ Time Frame: 3 Weeks ]
  • Attitude scale score [ Time Frame: 5 Weeks ]

Secondary Outcome Measures:

  • Intrinsic motivation scale score [ Time Frame: 3 Weeks ]
  • Intrinsic motivation scale score [ Time Frame: 5 Weeks ]

Estimated Enrollment: 72
Anticipated Study Start Date: June 2017
Estimated Study Completion Date: April 2018
Estimated Primary Completion Date: April 2018 (Final data collection date for primary outcome measure)
Active Comparator: Self-Monitoring Control

Daily tracking of fruit and vegetable consumption

Behavioral: self-monitoring

reporting counts and photos of fruit and vegetable consumption

Experimental: Daily Incentives

Incentives for fruit and vegetable consumption delivered daily

Behavioral: self-monitoring

reporting counts and photos of fruit and vegetable consumption

Behavioral: monetary incentives

payments for consuming fruits and vegetables

Experimental: Delayed Lump Sum Incentives

Incentives for fruit and vegetable consumption delivered in a lump sum at the end of the intervention

Behavioral: self-monitoring

reporting counts and photos of fruit and vegetable consumption

Behavioral: monetary incentives

payments for consuming fruits and vegetables

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Consume fewer than 3 servings/day of fruits and vegetables
  • Daily access to internet for 3 weeks following baseline session
  • Have or are willing to create an account on PayPal
  • BMI greater than or equal to 25, from self-reported height and weight

Exclusion Criteria:

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT03192254

University of Colorado Boulder
Boulder, Colorado, United States, 80309
Contact: Casey K Gardiner, MA    303-492-9549    casey.gardiner@colorado.edu   

University of Colorado, Boulder

Responsible Party: University of Colorado, Boulder
ClinicalTrials.gov Identifier: NCT03192254     History of Changes
Other Study ID Numbers: 16-0700
Study First Received: June 16, 2017
Last Updated: June 16, 2017
Individual Participant Data  
Plan to Share IPD: No

Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Additional relevant MeSH terms:

Overweight
Body Weight
Signs and Symptoms

ClinicalTrials.gov processed this record on June 20, 2017