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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT03192254
Other study ID # 16-0700
Secondary ID
Status Completed
Phase N/A
First received
Last updated
Start date July 13, 2017
Est. completion date March 30, 2018

Study information

Verified date July 2023
Source University of Colorado, Boulder
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial 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.


Recruitment information / eligibility

Status Completed
Enrollment 68
Est. completion date March 30, 2018
Est. primary completion date February 21, 2018
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years and older
Eligibility 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: -

Study Design


Intervention

Behavioral:
self-monitoring
recording fruit and vegetable consumption
daily monetary incentives
daily payments for consuming fruits and vegetables
delayed lump sum monetary incentives
lump sum payments for consuming fruits and vegetables

Locations

Country Name City State
United States University of Colorado Boulder Boulder Colorado

Sponsors (1)

Lead Sponsor Collaborator
University of Colorado, Boulder

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Fruit and vegetable consumption, servings per week 3 Weeks
Primary Fruit and vegetable consumption, servings per week 5 Weeks
Primary Perceived behavioral control scale score 3 Weeks
Primary Perceived behavioral control scale score 5 Weeks
Primary Attitude scale score 3 Weeks
Primary Attitude scale score 5 Weeks
Secondary Intrinsic motivation scale score 3 Weeks
Secondary Intrinsic motivation scale score 5 Weeks
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