Studies before 1995
Studies was conducted from 1959 to 1991. For those studies we provide data and documentation when these are available.
Pilot Twelve-Country Study
The study was conducted in order to investigate the feasibility of undertaking more extensive investigations of educational achievement. Testing was carried out in the five areas of mathematics, reading comprehension, geography, science, and non-verbal ability. The data were collected in 1959–1960.
Target Population
The target population was 13-year-old students. In some countries, the national sample was only partially representative.
Participating Educational Systems
Belgium, England, Finland, France, Germany (FRG), Israel, Poland, Scotland, Sweden, Switzerland, United States, Yugoslavia.
Publications