PIAAC Data and Tools

Twenty-four countries participated in Round 1 of the Survey of Adult Skills (PIAAC), with data collection taking place from 1 August 2011 to 31 March 2012 in most countries. Nine countries took part in Round 2 of the assessment, with data collection taking place from April 2014 to end-March 2015.

Data from Round 3 will be released in November 2019, with the addition of: Ecuador, Hungary, Kazakhstan, Mexico, Peru and United States.

For any queries, please contact


»Public Use Files (PUF)

Public Use Files containing individual unit record data in SAS, SPSS and CSV format are available for downloading for each of the countries participating in the Survey of Adult Skills.

Download the datasets (Public Use Files)


» List of missing variables in the PUF Files

In some countries, data protection laws mean that some variables cannot be included in the PUF for that country. This table provides a list of variables that are coded as “missing” in the PUF files, by country.

Download the list of missing variables


To access the Australian Public Use File please write to:



»PIAAC Log Files

The PIAAC Log Files contain a record of the interactions between respondents and the PIAAC computer testing application during the course of the PIAAC assessment


»Country Specific PUFs

Download here specific materials released for Germany and the United States
Read more


» IALS and ALL data

Public use microdata files containing data from the International Adult Literacy Survey (IALS) and the International Adult Literacy Skills Survey (ALL) can be accessed from Statistics Canada using the following links:

International Adult Literacy Survey (IALS)
International Adult Literacy Skills Survey (ALL)


As the full documentation contains information regarding non-released items, individuals who wish to access the documentation must apply to the OECD and sign a confidentiality agreement before being granted access.  Documentation that relates only to released items can be accessed here. 

In addition to documentation of the content of the PIAAC log-files, information concerning the methodology, design and implementation of PIAAC can be found in the Technical Report on the study and the Survey of Adult Skills: Reader’s Companion.

»Background Questionnaires

Download the International Master Questionnaire



» Codebooks

International codebook
Derived variables codebook


» Data compendia

These are sets of tables that provide categorical percentages for both cognitive and background items aiming to support PUF users gaining knowledge of the contents  and checking they are performing PUF analyses correctly.
Download the data compendia - Background variables (2013 - Round 1)
Download the data compendia - Background variables (2016 - Round 2)
Download the data compendia - Cognitive variables (2013 - Round 1)
Download the data compendia - Cognitive variables (2016 - Round 2)


» International Technical Report of the Survey of Adult Skills (PIAAC)

The report gives in details the technicalities of the Survey, including: the Assessment and Instrument Design, the Platform Development, the Field Operations and Quality Control, the Sampling and Weighting, the Data Analysis and Data Products.

Access the Technical Report

Tools for Analysis

The PIAAC Survey collects data using complex sample and psychometric designs making it necessary to use advanced statistical procedures to estimate sampling and measurements variances. The following tools have been designed to help SAS, Stata or SPSS users to explore the data and compute statistics.



  • International Database (IDB) Analyzer (SPSS) Read more:

Explore the Data

» International Data Explorer (IDE)

The IDE allows you to create statistical tables and charts to explore adults' performance in literacy, numeracy, and problem solving in technology-rich environments. Data can be analysed by country as well as in relation to demographic characteristics, social and linguistic background, education, use of skills and employment status. 

Access the IDE
Watch the IDE Training


» OECD Education GPS

The Education GPS will allow you to keep up to date with the latest OECD data and research on education and skills. 

Access the OECD Education GPS