Survey Experiment in Brazil

Last registered on May 30, 2025
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Pre-Trial

Trial Information

General Information

Title
Survey Experiment in Brazil
RCT ID
AEARCTR-0016092
Initial registration date
May 26, 2025

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
May 30, 2025, 9:22 AM EDT

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

Locations

Country
Brazil
Region

Primary Investigator

Name
Rachel Berwald
Affiliation
UCLA Political Science Department
Contact Primary Investigator

Other Primary Investigator(s)

Additional Trial Information

Status
On going
Start date
2025-05-22
End date
2025-06-30
Keywords
Behavior
Additional Keywords
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
How can the salience of political identity be decreased, and what are the consequences for information processing? Existing literature on increasing the salience of one’s social identity has focused primarily on doing so for one specific aspect (like religion or gender). However, no study has leveraged aspects of individuals’ complex and intersecting identities to decrease the salience of a single component of one’s identity—in this case, political identity. I use a survey experiment in Brazil to compare different interventions to understand the relative importance of political identity to an individual’s social identity. The stimuli include a partisan nudge, a nonpartisan nudge, and a national identity nudge. Primary outcomes include both attitudinal and behavioral measures.
External Link(s)

Registration Citation

Citation
Berwald, Rachel. 2025. "Survey Experiment in Brazil." AEA RCT Registry. May 30. https://doi.org/10.1257/rct.16092-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Intervention (Hidden)
Intervention Start Date
2025-05-22
Intervention End Date
2025-06-30

Primary Outcomes

Primary Outcomes (end points)
The primary outcomes include: belief in factual information and confidence in one's assessment, policy preferences, and willingness to interact with individuals who have different political beliefs.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
I plan to run a two-wave survey experiment in Brazil to understand how political identity salience can be decreased. In Wave 1, I will ask questions about identity, partisanship, social media use, and demographics. Approximately one week later, respondents will be recontacted to participate in Wave 2 of the survey. In this wave, respondents will be randomly sorted into one of three treatment groups (partisan nudge, nonpartisan nudge, and a national identity nudge) or the control group. I will also collect responses on the outcome measures.
Experimental Design Details
Randomization Method
Randomization will be done automatically in Qualtrics via simple randomization.
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
Around 1500 in the second wave
Sample size: planned number of observations
Around 1500 in the second wave
Sample size (or number of clusters) by treatment arms
Around 375 individuals will be in each treatment group.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Bruin IRB (UCLA)
IRB Approval Date
2025-02-03
IRB Approval Number
IRB-24-1397
Analysis Plan

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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