Skip to content

Understanding Mechanisms of Health Behavior

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02594319
Enrollment
61
Registered
2015-11-03
Start date
2015-02-28
Completion date
2015-06-30
Last updated
2023-08-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Fruit and Vegetable Consumption, Incentive Interventions

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.

Interventions

Sponsors

University of Colorado, Boulder
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Consume fewer than 5 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

Exclusion criteria

\-

Design outcomes

Primary

MeasureTime frame
Fruit and Vegetable Consumption, servings per week3 weeks
Perceived Behavioral Control scale score3 weeks
Attitudes scale score3 weeks
Intrinsic Motivation scale score3 weeks
Fruit and vegetable consumption, servings per week5 weeks

Secondary

MeasureTime frame
Perceived Stress Scale score3 weeks

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 27, 2026