Small-group tutorials in Colombia
Last registered on November 25, 2019

Pre-Trial

Trial Information
General Information
Title
Small-group tutorials in Colombia
RCT ID
AEARCTR-0005110
Initial registration date
November 25, 2019
Last updated
November 25, 2019 10:33 AM EST
Location(s)
Region
Primary Investigator
Affiliation
Inter-American Development Bank
Other Primary Investigator(s)
PI Affiliation
Inter-American Development Bank
PI Affiliation
Inter-American Development Bank
Additional Trial Information
Status
Completed
Start date
2015-03-01
End date
2018-12-31
Secondary IDs
Abstract
This RCT has two main goals. First, its most important objective is to assess the effectiveness of an intervention aimed at improving the reading skills of struggling third-grade students in Colombia. Students participated in remedial tutorials conducted during school hours in small groups. Trained teachers used structured pedagogical materials that can be easily scaled up. We designed the data collection so that to measure treatment effects during third grade and, to measure fade-out, in grade four (when no tutorials were offered). Second, we set out to implement this intervention with three cohorts of students and therefore we did a series of randomized experiments. The goal was to use the outcomes of each cohort to fine-tuned the intervention for each subsequent cohort.
External Link(s)
Registration Citation
Citation
Alvarez Marinelli, Horacio, Samuel Berlinski and Matias Busso. 2019. "Small-group tutorials in Colombia." AEA RCT Registry. November 25. https://doi.org/10.1257/rct.5110-1.0.
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Experimental Details
Interventions
Intervention(s)
Remediation tutorials (of 6 students or less) that followed a structured material to improve literacy skills of third grade students who were struggling to read at the grade level. The tutorials took place during school hours, 3 days a week, 40 minutes each day and lasted 12 to 16 weeks.
Intervention Start Date
2015-07-01
Intervention End Date
2017-12-31
Primary Outcomes
Primary Outcomes (end points)
EGRA test with the following subtasks: knowledge of letter sounds, reading of non-words, fluency of oral reading and reading comprehension.
Primary Outcomes (explanation)
We construct a more comprehensive measure of literacy which is a simple sum of all the items of the four subtasks.
Secondary Outcomes
Secondary Outcomes (end points)
Two subtasks of the EGMA test: additions and subtractions.
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
In each of the three cohorts (2015, 2016, 2017) we administered the EGRA test to all third graders at the beginning of the school year. We then used those results to determine a threshold for the population. All students whose score was below the threshold were deemed eligible. Treated students are eligible students in schools randomized to treatment. Control students are eligible students in schools randomized to control.
Experimental Design Details
Randomization Method
Randomization done in office by a computer
Randomization Unit
Schools
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
We modified the sample overtime for costs reasons. The number of schools: 94 (2015), 84 (2016), 80 (2017)
Sample size: planned number of observations
1100 (2015), 750 (2016), 700 (2017)
Sample size (or number of clusters) by treatment arms
2015: 48 (T), 46 (C); 2016: 42 (T), 42 (C); 2017: 40 (T), 40 (C)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
0.2-0.3 s.d.
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
IRB Approval Date
IRB Approval Number
Post-Trial
Post Trial Information
Study Withdrawal
Intervention
Is the intervention completed?
Yes
Intervention Completion Date
December 31, 2017, 12:00 AM +00:00
Is data collection complete?
Yes
Data Collection Completion Date
December 31, 2018, 12:00 AM +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
94 (2015), 84 (2016), 80 (2017)
Was attrition correlated with treatment status?
No
Final Sample Size: Total Number of Observations
2610
Final Sample Size (or Number of Clusters) by Treatment Arms
2015: 46 (C), 48 (T); 2016: 42 (T), 42 (C); 2017: 40 (T), 40 (C)
Data Publication
Data Publication
Is public data available?
No

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Program Files
Program Files
No
Reports and Papers
Preliminary Reports
Relevant Papers