Understanding Mechanisms of Health Behavior

NCT02594319 | Completed

• 1 other identifier: 14-0684
• Study Type: interventional
• Target: 61
• Locations: 0 countries
• Sites: N/A

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.

Conditions

Fruit and Vegetable Consumption; Incentive Interventions

Outcome Measures

Primary Outcomes (8)

• Fruit and Vegetable Consumption, servings per week

  3 weeks

• Perceived Behavioral Control scale score

  3 weeks

• Attitudes scale score

  3 weeks

• Intrinsic Motivation scale score

  3 weeks

• Fruit and vegetable consumption, servings per week

  5 weeks

• Perceived Behavioral Control scale score

  5 weeks

• Attitudes scale score

  5 weeks

• Intrinsic Motivation scale score

  5 weeks

Secondary Outcomes (2)

• Perceived Stress Scale score

  3 weeks

• Perceived Stress Scale score

  5 weeks

Study Arms (3)

Control

ACTIVE COMPARATOR

Daily reporting of fruit and vegetable consumption

Behavioral: Self monitoring

Daily reward

EXPERIMENTAL

Incentives for fruit and vegetable consumption delivered daily

Behavioral: Monetary incentives; Behavioral: Self monitoring

Delayed reward

EXPERIMENTAL

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

Behavioral: Monetary incentives; Behavioral: Self monitoring

Interventions

Monetary incentives BEHAVIORAL

Daily reward; Delayed reward

Self monitoring BEHAVIORAL

Control; Daily reward; Delayed reward

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• 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

Sponsors & Collaborators

• University of Colorado, Boulder: lead

Related Publications (1)

• Gardiner CK, Bryan AD. Monetary Incentive Interventions Can Enhance Psychological Factors Related to Fruit and Vegetable Consumption. Ann Behav Med. 2017 Aug;51(4):599-609. doi: 10.1007/s12160-017-9882-4.

  PMID: 28176150 DERIVED

MeSH Terms

Interventions

Blood Glucose Self-Monitoring

Intervention Hierarchy (Ancestors)

Blood Chemical Analysis; Clinical Chemistry Tests; Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Diagnostic Techniques, Endocrine; Monitoring, Physiologic; Self-Testing; Self Care; Therapeutics; Investigative Techniques

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PI

Study Record Dates

• First Submitted: October 30, 2015
• First Posted: November 3, 2015
• Study Start: February 1, 2015
• Primary Completion: June 1, 2015
• Study Completion: June 1, 2015
• Last Updated: August 1, 2023

Record last verified: 2023-07