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OpenTrials
Completed

NCT Number: NCT02594319

Understanding Mechanisms of Health Behavior

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.

Completed

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

-

Treatment and study plan

Monetary Incentives

Behavioral

Self monitoring

Behavioral

Primary outcomes

  1. Fruit and Vegetable Consumption, servings per week

    Time frame: 3 weeks

  2. Perceived Behavioral Control scale score

    Time frame: 3 weeks

  3. Attitudes scale score

    Time frame: 3 weeks

  4. Intrinsic Motivation scale score

    Time frame: 3 weeks

  5. Fruit and vegetable consumption, servings per week

    Time frame: 5 weeks

  6. Perceived Behavioral Control scale score

    Time frame: 5 weeks

  7. Attitudes scale score

    Time frame: 5 weeks

  8. Intrinsic Motivation scale score

    Time frame: 5 weeks

Secondary outcomes

  1. Perceived Stress Scale score

    Time frame: 3 weeks

  2. Perceived Stress Scale score

    Time frame: 5 weeks

Sponsors and collaborators

Lead sponsor

University of Colorado, Boulder

Other

Registry information

Important dates

Study start
2015
Primary completion
2015
Study completion
2015
First posted
Nov 3, 2015
Registry last updated
Aug 1, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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