Reminder redesigned: using nudge to improve attendance at social services

Last registered on March 01, 2021

Pre-Trial

Trial Information

General Information

Title
Reminder redesigned: using nudge to improve attendance at social services
RCT ID
AEARCTR-0007262
Initial registration date
February 26, 2021

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
March 01, 2021, 10:39 AM EST

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

Locations

Region

Primary Investigator

Affiliation

Other Primary Investigator(s)

Additional Trial Information

Status
On going
Start date
2021-02-08
End date
2021-04-23
Secondary IDs
Abstract
We are examining a nudge intervention to increase attendance. We will redesign a SMS reminder using "social norms".
External Link(s)

Registration Citation

Citation
Pacheco, Tainá. 2021. "Reminder redesigned: using nudge to improve attendance at social services." AEA RCT Registry. March 01. https://doi.org/10.1257/rct.7262
Experimental Details

Interventions

Intervention(s)
A SMS reminder with social norms.
Intervention Start Date
2021-02-23
Intervention End Date
2021-04-06

Primary Outcomes

Primary Outcomes (end points)
Attendance
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
2 conditions: control (the existing reminder) and treatment (reminder with social norms)
individuals randomly assigned in even proportion to each condition.
Stratified by unit and service.
Experimental Design Details
Randomization Method
Randomization done by computer using R.
Randomization Unit
Individual.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
No cluster
Sample size: planned number of observations
56000 individuals
Sample size (or number of clusters) by treatment arms
28000 control
28000 treatment
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Between 1 and 1.5 percentage points (control group mean 38%).
IRB

Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number

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