Understanding Mechanisms of Health Behavior

University of Colorado Boulder (CU)

Status: Completed

Conditions: Fruit and Vegetable Consumption; Incentive Interventions

Treatments: Behavioral: Monetary incentives; Behavioral: Self monitoring

Study type: Interventional

Funder types: Other

Identifiers

NCT02594319

14-0684

Details and patient eligibility

About

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.

Enrollment: 61 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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61 participants in 3 patient groups

Control

Active Comparator group

Description:

Daily reporting of fruit and vegetable consumption

Treatment:

Behavioral: Self monitoring

Daily reward

Experimental group

Description:

Incentives for fruit and vegetable consumption delivered daily

Treatment:

Behavioral: Monetary incentives

Behavioral: Self monitoring

Delayed reward

Experimental group

Description:

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

Treatment:

Behavioral: Monetary incentives

Behavioral: Self monitoring