CURIOSAMENTE: PLAY-BASED INTERVENTIONS FOR STRENGTHENING COGNITIVE AND SOCIOEMOTIONAL DEVELOPMENT IN BRAZILIAN PRESCHOOLS

Last registered on November 19, 2025

Pre-Trial

Trial Information

General Information

Title
CURIOSAMENTE: PLAY-BASED INTERVENTIONS FOR STRENGTHENING COGNITIVE AND SOCIOEMOTIONAL DEVELOPMENT IN BRAZILIAN PRESCHOOLS
RCT ID
AEARCTR-0017224
Initial registration date
November 14, 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
November 19, 2025, 1:42 PM EST

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

Locations

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Primary Investigator

Affiliation
University of São Paulo

Other Primary Investigator(s)

PI Affiliation
UFSC
PI Affiliation
UFJF
PI Affiliation
LEPES
PI Affiliation
USP

Additional Trial Information

Status
In development
Start date
2026-02-23
End date
2026-08-14
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This project will employ a school-based randomized controlled trial (RCT) to evaluate the impact of structured play on cognitive and socio-emotional development in 4- to 5-year-old children from public preschools in Bahia, Brazil. 121 schools will be randomly assigned to treatment and control groups. The kids in treatment group will play social and math games while the control group will not receive treatment.
The intervention consists of three social games and three math games, designed to develop key skills such as emotional regulation, numeracy, and geometry. Children will engage in these games for 2-3 sessions per week, over 12 weeks, under the supervision of their classroom teachers. Teacher professional development is a key component of the program and includes expert-led workshops covering play-based pedagogical methods, neurodevelopment, mathematical cognition, socio-emotional learning.
We will conduct assessments at two key time points: baseline (pre-intervention) and a post-intervention (1 month after the end of the intervention).

External Link(s)

Registration Citation

Citation
Andrade, Nara et al. 2025. "CURIOSAMENTE: PLAY-BASED INTERVENTIONS FOR STRENGTHENING COGNITIVE AND SOCIOEMOTIONAL DEVELOPMENT IN BRAZILIAN PRESCHOOLS." AEA RCT Registry. November 19. https://doi.org/10.1257/rct.17224-1.0
Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2026-03-16
Intervention End Date
2026-06-12

Primary Outcomes

Primary Outcomes (end points)
Emotion Knowledge and Mathematical Cognition
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
121 schools will be randomly assigned to treatment and control groups. We will conduct assessments at two key time points: baseline (pre-intervention) and a post-intervention (1 month after the end of the intervention).
Experimental Design Details
Not available
Randomization Method
Randomization done in office by a computer
Randomization Unit
randomization unit: schools
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
121 schools
Sample size: planned number of observations
1452 students
Sample size (or number of clusters) by treatment arms
60 schools treatment and 61 schools control.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Comitê de Ética em Pesquisa com Seres Humanos (CEPSH/UFSC) Federal de Santa Catarina
IRB Approval Date
2025-05-27
IRB Approval Number
7.596.496