Impacts of access to book corners and reading diaries on cognitive and non-cognitive outcomes: A field experiment in Nan, Thailand

Last registered on March 20, 2025

Pre-Trial

Trial Information

General Information

Title
Impacts of access to book corners and reading diaries on cognitive and non-cognitive outcomes: A field experiment in Nan, Thailand
RCT ID
AEARCTR-0015572
Initial registration date
March 15, 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
March 19, 2025, 9:30 AM EDT

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

Last updated
March 20, 2025, 11:59 PM EDT

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

Locations

Primary Investigator

Affiliation
Faculty of Economics, Chulalongkorn University

Other Primary Investigator(s)

PI Affiliation
Social Research Institute, Chulalongkorn University
PI Affiliation
Office of the Education Council, The Ministry of Education
PI Affiliation
Faculty of Education, Chulalongkorn University
PI Affiliation
Faculty of Education, Silpakorn University
PI Affiliation
College of Population Studies, Chulalongkorn University
PI Affiliation
Faculty of Humanities, Srinakharinwirot University

Additional Trial Information

Status
Completed
Start date
2017-06-19
End date
2025-02-11
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
The study aims to evaluate the impacts of access to book corners that are equipped with grade-appropriate children’s books and reading diaries to primary school students on both cognitive and non-cognitive outcomes and in both short and long runs. Whilst previous RCTs that also experiment on providing textbooks and books barely find significant effects mostly due to language barriers, our study exploits the setup in Thailand that students’ mother tongue and the language used in the books are the same. We randomly divide randomly chosen 62 schools with altogether 5,708 students into three groups. The first group of 21 schools each receives a book corner with a set of children’s books that span a variety of topics from popular science to children’s literature, and each individual student gets a grade-tailored reading diary to match the children's books. The second treatment group of 21 schools is also provided with a book corner but the students get no reading diaries. The two treatments help distinguish whether there is a differential impact between reading-for-purpose (Treatment 1) and reading-for-pleasure (Treatment 2) among primary school students. The rest of the 20 schools constitute the control group.

Regarding cognitive outcomes, we test the students on the literacy of Thai language by the Programmes’ own devised Thai reading and writing tests for each grade at End points 1 and 2, after an academic year and a summer holiday. Due to a lack of funding, for longer terms, we first rely on the standardised grade-appropriate reading and writing Thai language tests by the Ministry of Education at End point 3, three years after the commencement of the intervention. Second, we utilise the standardised national test (O-NET) on Thai language, Mathematics, Science and English for students in sixth grade, the last grade for primary education. As such, this End point 4 spans one to five years after the start of the intervention. This test enables us to evaluate the spillover impact of reading proficiency on other subjects.

With reference to non-cognitive outcomes, we based our investigation on our devised questionnaires given to the students at End points 1 and 2. They cover library-using and non-textbook reading behaviours, school-domain attentiveness and empathy, which are characters that are closely related to reading and hence access to book resources. While literature shows that school-domain attentiveness is crucial for individual life outcomes, empathy can additionally improve social outcomes.
External Link(s)

Registration Citation

Citation
Chankrajang, Thanyaporn et al. 2025. "Impacts of access to book corners and reading diaries on cognitive and non-cognitive outcomes: A field experiment in Nan, Thailand." AEA RCT Registry. March 20. https://doi.org/10.1257/rct.15572-1.1
Experimental Details

Interventions

Intervention(s)
The study aims to evaluate the impacts of access to book corners that are equipped with grade-appropriate children’s books and reading diaries to primary school students on both cognitive and non-cognitive outcomes and in both short and long runs. We randomly divide randomly chosen 62 schools with altogether 5,708 students from Grades 1 to 6 in Lower Nan Province into three groups. The first group of 21 schools each receives a book corner with a set of 129 children’s books. The books have been evaluated by children’s books experts and academics. They cover children’s literature, popular science, character-building children’s books, and creativity-and-imagination-enhancing children’s books. The book corner consists of an inviting, colourful and visible shelf, sitting mats and a Japanese table. Also, for the first treatment group, each individual student gets a grade-tailored reading diary, designed by the Programme, to match the children's books for each grade. The second treatment group of 21 schools is also provided with a book corner but the students get no reading diaries. The two treatments help distinguish whether there are differential cognitive and non-cognitive impacts between reading-for-purpose (Treatment 1) and reading-for-pleasure (Treatment 2) among primary school students. The rest of the 20 schools constitute the control group. The treatment schools in both groups get to keep the book corners even after the completion of the experiment.
Intervention (Hidden)
Intervention Start Date
2017-06-19
Intervention End Date
2023-02-11

Primary Outcomes

Primary Outcomes (end points)
End point 1: Short-run impacts after an academic year
(i) Library-using and non-textbook reading behaviours
(ii) Cognitive outcomes in terms of literacy of Thai language tested by the Programmes’ own devised Thai reading and writing tests for each grade
(iii) Non-cognitive outcomes that can be related to reading – attentiveness
(iv) Non-cognitive outcomes that can be related to reading -- empathy

End point 2: Medium-run impacts after a summer holiday and before the students learn new literacy material of the new academic year according to their curriculum
(i) Cognitive outcomes in terms of literacy of Thai language tested by the Programmes’ own devised Thai reading and writing tests for each grade
(ii) Non-cognitive outcomes that can be related to reading – attentiveness
(iii) Non-cognitive outcomes that can be related to reading -- empathy

End point 3: Long-run cognitive outcomes after three years from the start of the intervention.
Using the reading and writing Thai language tests for each grade, based on the nationalised tests by the Ministry of Education.

End point 4: Long-run cognitive outcomes when students from each grade reach grade 6.
Using the nationalised O-NET exam on Thai language, Mathematics, Science, and English to test the long-term effects whether reading can have a spillover impact on the proficiency of other subjects that are also based on the ability to read, understand and analyse, and concentrate.

Note that the O-NET, which stands for "Ordinary National Educational Test," is a standardised, nationwide exam in Thailand that assesses the knowledge and abilities of students in grades 6, 9, and 12, primarily used to evaluate the quality of education at a national level and inform teaching practices within schools; it is administered by the National Institute of Educational Testing Service (NIETS) and is based on the Basic Education Core Curriculum of Thailand.
Primary Outcomes (explanation)
End point 1:
(i) Library-using and non-textbook reading behaviours
Constructed from the questionnaires asking
1. “Do you know where the library is?”
(a) Yes
(b) No
2. “Do you find library as a relaxing reading space?”
(a) Yes
(b) No
3. “Do you find library as a peaceful place you can focus?”
(a) Yes
(b) No
4. “How often do you read non-textbooks?”
(a) Every day
(b) Some days
(c) Never
As reading every day is a small fraction of the answers, we combine (a) and (b) to constitute the variable of reading some days or every day and assign the value 1. Never reading non-textbooks, in contrast, is assigned to the binary measure of 0.
5. “Do you enjoy reading non-textbooks?”
(a) Yes
(b) No
(c) Just so-so
As the number of students who answer NO is very small, we combine Just so-so and No to create the binary measure of 0. For those who enjoy it, we assign the value of 1.

(ii) Cognitive outcomes in terms of literacy of Thai language tested by the Programmes’ own devised Thai reading and writing tests for each grade.
Constructed from the raw scores of each student, we construct a z-score based on the normalisation of subtracting the mean and dividing it by the standard deviation of the treatment group of the same grade. The tests were also piloted in a school in the neighbouring Payao Province to test the validity and the distribution of the raw scores.

(iii) Non-cognitive outcomes that can be related to reading – attentiveness
The construction of the binary variable is based on the questions in Eysenck test (Eysenck, 1984) that are relevant to school-domain attentiveness.
1. “Do you usually work quickly without bothering to check answers?”
(a) Yes
(b) No
2. “Do you sometimes put down the first answer during the test and forget to check it later?”
(a) Yes
(b) No

(iv) Non-cognitive outcomes that can be related to reading – empathy
The ordinal variable construction is based on the following questions.
1. “When reading books or watching animation, I feel bonded and understand the feelings of the characters.”
(a) Yes, that is very true.
(b) Yes, but just sometimes.
(c) Never.
2. “Whenever I have a chance, I always help others.”
(a) Yes, that is very true.
(b) Yes, but just sometimes.
(c) Never.

End point 2:
(i) Cognitive outcomes in terms of literacy of Thai language tested by the Programmes’ own devised Thai reading and writing tests for each grade.
Constructed from the raw scores of each student, we construct a z-score based on the normalisation of subtracting the mean and dividing it by the standard deviation of the treatment group of the same grade. The tests were also piloted in a school in the neighbouring Payao Province to test the validity and the distribution of the raw scores.

(ii) Non-cognitive outcomes that can be related to reading – attentiveness
The construction of the binary variable is based on the questions in Eysenck test (Eysenck, 1984) that are relevant to school-domain attentiveness.
1. “Do you usually work quickly without bothering to check answers?”
(a) Yes
(b) No
2. “Do you sometimes put down the first answer during the test and forget to check it later?”
(a) Yes
(b) No

(iii) Non-cognitive outcomes that can be related to reading – empathy
The ordinal variables are constructed from the following questions.
1. “When reading books or watching animation, I feel bonded and understand the feelings of the characters.”
(a) Yes, that is very true.
(b) Yes, but just sometimes.
(c) Never.
2. “Whenever I have a chance, I always help others.”
(a) Yes, that is very true.
(b) Yes, but just sometimes.
(c) Never.


End point 3: Long-run cognitive outcomes after three years from the start of the intervention
Using reading and writing Thai language test based on nationalised tests by the Ministry of Education.
From the raw scores of each student, we construct a z-score based on the normalisation of subtracting the mean and dividing it by the standard deviation of the treatment group of the same grade. For Grades 4 to 6 students, who were in Grades 1 to 3 at the start of the intervention, the scores cover four categories, (i) reading aloud, (ii) reading comprehension, (iii) total reading, and (iv) writing. As some schools have a secondary-school-level extension, we also test Grades 7 to 9 students, who were in Grades 4 to 6 at the beginning of the intervention. Their scores span two categories, (i) reading comprehension and (ii) writing.

End point 4: Long-run cognitive outcomes when students from each grade reach grade 6.
Using the nationalised O-NET exam on Thai language, Mathematics, Science, and English to test the long-term effects whether reading can have a spillover impact on the proficiency of other subjects that are also based on the ability to read, understand and analyse, and concentrate. For each subject, From the raw scores of each student, we construct a z-score based on the normalisation of subtracting the mean and dividing it by the standard deviation of the treatment group of the same batch.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The trial is designed to test the significance of access to children’s books’ resources or resource constraint hypothesis. As such, we have the treatment groups that are provided with book corners. To further illustrate the mechanism inside the children’s reading process, we have two distinct treatment groups; one with reading dairies designed particularly for each grade’s books and distributed to individual students, and one without. This helps us distinguish whether there is a differential impact between reading-for-purpose and reading-for-pleasure. The trial is conducted upon the 62 randomly chosen state primary schools with altogether 5,708 students in Lower Nan Province, which represents primary schools in Thailand. We obtain the names of the schools in the Regional Education Area One of Nan Province which is in Lower Nan and then randomise to select schools into the sample and then randomise again to assign the schools into three groups. Then we contact the schools to see whether they would like to participate in the experiment. All of them agree. We do not target any group of children but all children in primary schools that participate in the Programme.
Experimental Design Details
Randomization Method
Randomisation was done in the office by a computer over all state primary schools in Lower Nan Regional Education Area.
Randomization Unit
School
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
Number of schools: 62 schools in total
Treatment 1: 21 schools
Treatment 2: 21 schools
Control: 20 Schools
Sample size: planned number of observations
Number of students across all treatment arms: 5,708 students altogether from Grades 1 to 6.
Sample size (or number of clusters) by treatment arms
Treatment 1: 21 schools and 2,319 students
The schools in Treatment 1 receive a book corner with a set of 129 children’s books. They cover children’s literature, popular science, character-building children’s books, and creativity-and-imagination-enhancing children’s books. The book corner consists of an inviting, colourful and visible shelf, sitting mats and a Japanese table. Also, for the first treatment group, each individual student gets a grade-tailored reading diary, designed by the Programme, to match the children's books assigned for that grade.

Treatment 2: 21 schools and 1,617 students
The second treatment group of 21 schools is also provided with a book corner but the students get no reading diaries.

Control: 20 schools and 1,772 students
The control schools receive nothing.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Human Ethics Review Committee: Set 1, Office of Research Affairs, Chulalongkorn University
IRB Approval Date
2017-06-20
IRB Approval Number
COA136/2017

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
Yes
Intervention Completion Date
February 11, 2023, 12:00 +00:00
Data Collection Complete
Yes
Data Collection Completion Date
September 01, 2024, 12:00 +00:00
Final Sample Size: Number of Clusters (Unit of Randomization)
End point 1: 58 schools
End point 2: 59 schools
End point 3: 59 schools
End point 4: 54 schools
Was attrition correlated with treatment status?
Yes
Final Sample Size: Total Number of Observations
End point 1: 4,653 students from 58 schools
End point 2: 3,764 students from 59 schools
End point 3: 3,148 students from 59 schools
End point 4: 3,239 students from 54 schools
Final Sample Size (or Number of Clusters) by Treatment Arms
End point 1: 4,653 students from 58 schools, Treatment 1: 1,780 students from 19 schools, Treatment 2: 1,451 students from 20 schools, Control: 1,422 students from 19 schools. End point 2: 3,764 students from 59 schools, Treatment 1: 1,485 students from 20 schools, Treatment 2: 1,238 students from 21 schools, Control: 1,041 students from 18 schools. End point 3: 3,148 students from 59 schools, Treatment 1: 1,364 students from 21 schools, Treatment 2: 865 students from 20 schools, Control: 919 students from 18 schools. End point 4: 3,239 students from 54 schools, Treatment 1: 1,236 students from 17 schools, Treatment 2: 1,087 students from 20 schools, Control: 916 students from 17 schools.
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials