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Understanding Mechanisms of Health Behavior Change

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ClinicalTrials.gov Identifier: NCT03192254
Recruitment Status : Completed
First Posted : June 20, 2017
Last Update Posted : October 19, 2018
Sponsor:
Information provided by (Responsible Party):
University of Colorado, Boulder

Brief Summary:
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.

Condition or disease Intervention/treatment Phase
Overweight and Obesity Diet Modification Incentives Behavioral: self-monitoring Behavioral: daily monetary incentives Behavioral: delayed lump sum monetary incentives Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 68 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Basic Science
Official Title: Understanding Mechanisms of Health Behavior Change
Actual Study Start Date : July 13, 2017
Actual Primary Completion Date : February 21, 2018
Actual Study Completion Date : March 30, 2018

Arm Intervention/treatment
Active Comparator: Self-Monitoring Control
Daily tracking of fruit and vegetable consumption
Behavioral: self-monitoring
recording fruit and vegetable consumption

Experimental: Daily Incentives
Incentives for fruit and vegetable consumption delivered daily
Behavioral: self-monitoring
recording fruit and vegetable consumption

Behavioral: daily monetary incentives
daily 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
recording fruit and vegetable consumption

Behavioral: delayed lump sum monetary incentives
lump sum payments for consuming fruits and vegetables




Primary Outcome Measures :
  1. Fruit and vegetable consumption, servings per week [ Time Frame: 3 Weeks ]
  2. Fruit and vegetable consumption, servings per week [ Time Frame: 5 Weeks ]
  3. Perceived behavioral control scale score [ Time Frame: 3 Weeks ]
  4. Perceived behavioral control scale score [ Time Frame: 5 Weeks ]
  5. Attitude scale score [ Time Frame: 3 Weeks ]
  6. Attitude scale score [ Time Frame: 5 Weeks ]

Secondary Outcome Measures :
  1. Intrinsic motivation scale score [ Time Frame: 3 Weeks ]
  2. Intrinsic motivation scale score [ Time Frame: 5 Weeks ]


Information from the National Library of Medicine

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

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:

-


Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03192254


Locations
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United States, Colorado
University of Colorado Boulder
Boulder, Colorado, United States, 80309
Sponsors and Collaborators
University of Colorado, Boulder

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Responsible Party: University of Colorado, Boulder
ClinicalTrials.gov Identifier: NCT03192254     History of Changes
Other Study ID Numbers: 16-0700
First Posted: June 20, 2017    Key Record Dates
Last Update Posted: October 19, 2018
Last Verified: October 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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

Additional relevant MeSH terms:
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Overweight
Body Weight
Signs and Symptoms