Brief Summary

In a series of controlled, randomized experiments, we will systematically manipulate exposure to health-related messages and/or survey methods to examine the effects on behavioral intention. There are various strategies used to influence health-related decision making and the effects of health behavior have had mixed results. In particular, incentive-based interventions have often failed to increase healthy behavior. We will examine 1) the role of behavioral motivation to increase sleep or exercise and 2) current levels of sleep or exercise when predicting who is interested in a mock RCT invitation to increase each behavior using financial or social incentives. In addition to the above focus on sleep and exercise, we will also examine another important health behavior: vaccination. Embedded within experiments studying effects of incentives on vaccination decisions, will conduct methodological tests. In particular, we will estimate the effects of using different methods of measuring the study outcome (vaccine intention).

Trial Health

On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment

4,000

participants targeted

Target at P75+ for not_applicable

Timeline

Completed

Started Feb 2021

Typical duration for not_applicable

Geographic Reach

1 country

1 active site

Status

completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

2.9 years study duration

First Submitted

Initial submission to the registry

February 2, 2021

Completed

5 days until next milestone

Study Start

First participant enrolled

February 7, 2021

Completed

3 days until next milestone

First Posted

Study publicly available on registry

February 10, 2021

Completed

2.9 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 30, 2023

Completed

Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

December 30, 2023

Completed

Last Updated

February 15, 2024

Status Verified

February 1, 2024

Enrollment Period

2.9 years

First QC Date

February 2, 2021

Last Update Submit

February 13, 2024

Conditions

Behavior Intention

Keywords

decisionRCT enrollmentincentivesmandatesmessage effectsintentionmethodsinstrumentation effectsvaccine hesitancysleepexercise physical activity behaviors

Outcome Measures

Primary Outcomes (2)

measure of whether they are interested in RCT enrollment (for sleep or exercise)
subjects will select a response option to indicate if they are "not interested," "slightly interested," or "very interested"
through the duration of the experiment: less than 1 day
measure of decision (vaccine intention)
subjects select a response option from a 2 ("yes" or "no") or 3 (yes, no, unsure) level response set
through the duration of the experiment: less than 1 day

Secondary Outcomes (1)

likelihood of behavior
through the duration of the experiment: less than 1 day