Understanding Mechanisms of Health Behavior Change

NCT ID: NCT03192254

Last Updated: 2023-08-01

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

68 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-07-13

Study Completion Date

2018-03-30

Brief Summary

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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.

Detailed Description

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Conditions

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Overweight and Obesity Diet Modification Incentives

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

SINGLE

Participants

Study Groups

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Self-Monitoring Control

Daily tracking of fruit and vegetable consumption

Group Type ACTIVE_COMPARATOR

self-monitoring

Intervention Type BEHAVIORAL

recording fruit and vegetable consumption

Daily Incentives

Incentives for fruit and vegetable consumption delivered daily

Group Type EXPERIMENTAL

self-monitoring

Intervention Type BEHAVIORAL

recording fruit and vegetable consumption

daily monetary incentives

Intervention Type BEHAVIORAL

daily payments for consuming fruits and vegetables

Delayed Lump Sum Incentives

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

Group Type EXPERIMENTAL

self-monitoring

Intervention Type BEHAVIORAL

recording fruit and vegetable consumption

delayed lump sum monetary incentives

Intervention Type BEHAVIORAL

lump sum payments for consuming fruits and vegetables

Interventions

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self-monitoring

recording fruit and vegetable consumption

Intervention Type BEHAVIORAL

daily monetary incentives

daily payments for consuming fruits and vegetables

Intervention Type BEHAVIORAL

delayed lump sum monetary incentives

lump sum payments for consuming fruits and vegetables

Intervention Type BEHAVIORAL

Eligibility Criteria

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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

\-
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Colorado, Boulder

OTHER

Sponsor Role lead

Responsible Party

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Angela Bryan

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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University of Colorado Boulder

Boulder, Colorado, United States

Site Status

Countries

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United States

Other Identifiers

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16-0700

Identifier Type: -

Identifier Source: org_study_id

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