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Programme for the International
Assessment of Adult Competencies

International PIAAC Log Files

The PIAAC 2012 study was the first international large-scale assessment to implement a fully computer-based measurement of adults’ key competences. During the cognitive assessment, user interactions were logged automatically by the interview software. This means that most of the users’ actions during the direct assessment were recorded and stored with time stamps in separate so-called log files. The log files contain paradata for each participant for one or two of the following competence domains: literacy, numeracy, or problem solving in technology-rich environments. The availability of these log files and the detailed information contained therein offers exciting new research opportunities to data analysts. For instance, this data can be used to reproduce and better understand individual test-taking behavior. For more information see below or visit the OECD PIAAC Log File Website.

In this dataset all critical information in open entry text boxes were replaced with "X" to retain the information on the length of the entered text.

ZA6712: Programme for the International Assessment of Adult Competencies (PIAAC), log files

Data collection period

August 2011 - November 2012

Available since

November 2017

Target population

16- to 65-year-old adults

Sample size


PIAAC instruments

Computer-based assessment in the domains literacy, numeracy and problem solving in technology-rich environments

Countries Austria, Belgium (Flanders), Denmark, Estonia, Finland, France, Germany, Ireland, Italy, Netherlands, Norway, Poland, Republic of Korea, Slovakia, Spain, United Kingdom (England and Northern Ireland), United States

Further documentation

PIAAC Log Data Documentation

PIAAC Item Documentation (Confidential Part), please send this document to the contact officer at the OECD

Technical Report

Beyond Proficiency: Using Log Files to Understand Respondent Behaviour in the Survey of Adult Skills (2019)

Data access PIAAC log files via GESIS Data Catalogue (DBK)
Tool for the analysis

PIAAC LogDataAnalyzer

With the help of this LogDataAnalyzer you can generate a data set which can be merged with the international PIAAC Public Use Files.


Organisation for Economic Cooperation and Development (OECD) (2017). Programme for the International Assessment of Adult Competencies (PIAAC), German* log file. Data file version 2.0.0 []. Cologne: GESIS Data Archive. doi: 10.4232/1.12955

*Replace with appropriate country.