The present study aims to describe the extent and forms (integrated versus segregated) of special education support offered to pupils in comprehensive schools in Sweden over a period of 29 years and to study relations between support, background variables and goal attainment in Grade 9. The study is based on about 35,000 children born in 1972,…

Selection effects in the Swedish Scholastic Aptitude Test due to socioeconomic status (SES) were studied using data from longitudinal studies (n=8,222). Results show that subjects from low SES groups constitute the most positively-selected group even though they obtain the lowest test scores. Gender and grade differences are discussed. (MAK)

A summary and discussion of a series of studies considered the dilemma that equal educational treatment of all children in public schools appears likely to increase the spread of differences among them in educational achievement. Longitudinal studies of pairs of identical and of fraternal twins in Sweden from 10 to 18 years of age considered the…

A comparison was made of ability and achievement test results and school grades for 323 pairs of Swedish male and female twins and 740 controls in relation to social background. An interaction effect of sex and social background was found for verbal ability and mathematics test results. (SLD)