TIMSS 2015 Restricted Use Data

The TIMSS 2015 Restricted Use Data will only be made available upon special request by researchers. It contains all data freely available in the TIMSS 2015 Public Use Data, plus the additional variables listed below.

Researchers who want to use the additional data below need to formally apply and provide reasoning why they would need the additional data. They need to agree not to disclose any individuals.

Application procedure

If you are interested in working with the Restricted Use Data, you will need to apply using the IEA Restricted Use Data Application Form. In addition, you need to sign the Restricted Use Agreement. Please download, complete, and sign both the application form and the agreement and send it to data@iea-hamburg.de.

The application will be reviewed by IEA staff, who will decide upon access to the data. Applicants will get feedback within 3-4 weeks. In case access is granted to the applicant, the IEA will provide details on how to access the restricted-use data.

If you are residing in one of the following countries Andorra, Argentina, Austria, Belgium, Bulgaria, Canada (commercial organization), Croatia, Czech Republic, Denmark, Estonia, Faroe Islands, Finland, France, Germany, Greece, Guernsey, Hungary, Iceland, Ireland, Isle of Man, Israel, Italy, Japan, Jersey, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Republic of Cyprus, Republic of Korea, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom, or Uruguay, please click here to download the Restricted Use Agreement.  

If you are residing in a country not mentioned in the above list, please click here to download the Restricted Use Agreement

Additional variables available in Restricted Use Data

These are the additional variables available in the Restricted Use Data:

Sampling/Tracking/Identification Variables

Variable name Description
ITBIRTHY Student birth year
ITBIRTHM Student birth month
ITDATEY Year of testing
ITDATEM Month of testing
CONDVAR1 Conditioning Variable
INOSS School/teacher/home background questionnaire data collection mode (online/paper)


School Questionnaire

Question Nr. Description
1 Total Enrollment
2 Enrollment <Target Grade>


Student Questionnaire

Question Nr. Description
2A Student birth month
2B Student birth year