An experiment in message design

Last registered on December 29, 2022
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Pre-Trial

Trial Information

General Information

Title
An experiment in message design
RCT ID
AEARCTR-0006414
Initial registration date
October 03, 2020

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
October 05, 2020, 10:35 AM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Last updated
December 29, 2022, 7:43 PM EST

Last updated is the most recent time when changes to the trial's registration were published.

Locations

Country
Kenya
Region

Primary Investigator

Name
Nicholas Otis
Affiliation
University of California, Berkeley
Contact Primary Investigator

Other Primary Investigator(s)

Additional Trial Information

Status
In development
Start date
2021-10-01
End date
2022-12-30
Keywords
Behavior, Health, Welfare
Additional Keywords
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This study examines the effect of incentives on motivation to develop effective text messages. Further study information will be released after data collection has been completed to avoid demand effects.
External Link(s)

Registration Citation

Citation
Otis, Nicholas. 2022. "An experiment in message design." AEA RCT Registry. December 29. https://doi.org/10.1257/rct.6414-4.2
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Further study information will be released after data collection has been completed to avoid demand effects.
Intervention Start Date
2021-10-31
Intervention End Date
2022-12-30

Primary Outcomes

Primary Outcomes (end points)
Percent of participants who opt in to receive information on coronavirus.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Further study information will be released after data collection has been completed to avoid demand effects.
Experimental Design Details
Study participants are invited to create text messages to motivate people to learn more about coronavirus. Incentives for message efficacy are randomized at the individual level.
Randomization Method
Randomization is done by computer.
Randomization Unit
Randomization takes place at the individual level.
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
At least 1,650 participants (messages) after applying screening criteria.
Sample size: planned number of observations
The messages will be distributed to at least 1,650*25=41,250 numbers.
Sample size (or number of clusters) by treatment arms
Approximately 550 messages per condition after applying screening criteria.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials

Documents

Document Name
Message Survey Materials
Document Type
other
Document Description
File
Message Survey Materials

MD5: 99fe768ef83ca1c81738bcc5862f47d2

SHA1: e8e71c6bfae6a18d337a6e2d1b1bc99470909c42

Uploaded At: October 28, 2021

Document Name
Topic Coding
Document Type
other
Document Description
File
Topic Coding

MD5: 3aff2c2d916bfd0101427b402519acb2

SHA1: 68c752e53636bebbec6bc8410500804c06d01359

Uploaded At: December 20, 2022

Document Name
Screening Survey Materials
Document Type
other
Document Description
File
Screening Survey Materials

MD5: 094afee57e6bbcf862efd8fa672112e8

SHA1: 9f681eee376b8d7c27c8a31b75d46df6e8c79444

Uploaded At: September 30, 2021

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IRB

Institutional Review Boards (IRBs)

IRB Name
University of California, Berkeley. Office for Protection of Human Subjects
IRB Approval Date
2020-04-10
IRB Approval Number
2020-03-13099
Analysis Plan

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials