Many studies have been made on the impact of supplemental instruction in supported courses, with most showing significantly better examination results for students attending supplemental instruction in comparison to those who do not. However, remarkably little attention has been devoted to following up whether the benefits of supplemental…

This study aimed to (a) assess language comprehension in children with autism spectrum disorders (ASD) without intellectual disability, (b) assess differences between ASD diagnostic subgroups, and (c) analyze the relationship between language comprehension and performance and verbal IQ, respectively. The 94 participants (83 boys, 11 girls; 4:0-6:8…

This paper provides evidence on the sources of differences in inequality in educational scores and their evolution over time in four European countries. Using Programme for International Student Assessment data from the 2000 and the 2006 waves, the paper shows that inequality decreased in Germany and Spain (two "decentralised" schooling…

Forty-eight male and 54 female left-handed junior college students in Stockholm were grouped according to familial sinistrality and strength of handedness. Performance on computerized reaction time (RT), maze, and verbal ability tests was assessed. Sex was the only factor differentiating left-handers on RT, and no factors affected verbal ability.…

The stability of some dimensions of ability between the ages of 12 and 15 years was investigated for 225 boys and 242 girls in Sweden. Testing in grades 6, 8, and 9 indicated high stability for the general intelligence factor and for the residual of the General Visual factor. (SLD)

Whether gender differences in Swedish Scholastic Aptitude Test results changed with the age and experience of new examinees was examined for 7,779 male and 7,294 female students, including those under age 24 newly eligible for the examination. No real differences were found for traditional age group and younger examinees. (SLD)

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)