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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Control | Active Comparator | Daily reporting of fruit and vegetable consumption |
|
| Daily reward | Experimental | Incentives for fruit and vegetable consumption delivered daily |
|
| Delayed reward | Experimental | Incentives for fruit and vegetable consumption delivered in a lump sum at the end of the intervention |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Monetary incentives | Behavioral |
| ||
| Self monitoring |
| Measure | Description | Time Frame |
|---|---|---|
| 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 |
| Measure | Description | Time Frame |
|---|---|---|
| Perceived Stress Scale score | 3 weeks | |
| Perceived Stress Scale score | 5 weeks |
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Inclusion Criteria:
Exclusion Criteria:
-
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| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28176150 | Derived | 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. |
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| ID | Term |
|---|---|
| D015190 | Blood Glucose Self-Monitoring |
| ID | Term |
|---|---|
| D001774 | Blood Chemical Analysis |
| D019963 | Clinical Chemistry Tests |
| D019411 | Clinical Laboratory Techniques |
| D019937 | Diagnostic Techniques and Procedures |
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| Behavioral |
|
| D003933 | Diagnosis |
| D003940 | Diagnostic Techniques, Endocrine |
| D008991 | Monitoring, Physiologic |
| D000085263 | Self-Testing |
| D012648 | Self Care |
| D013812 | Therapeutics |
| D008919 | Investigative Techniques |