The purpose of this study was to investigate the contributions of domain-general cognitive resources and different forms of arithmetic development to individual differences in pre-algebraic knowledge. Children (n = 279, mean age = 7.59 years) were assessed on 7 domain-general cognitive resources as well as arithmetic calculations and word problems…

Mathematics achievement differences among sixth-graders were analyzed in a four-wave design and explained by aptitude and instructional variables in a structural equation framework. The results demonstrate the local nature of achievement models in that neither their measurement nor structural components proved generalizable across two groups of…

Individual differences in academic success were investigated in a geographically defined whole-population sample of very preterm children with a gestational age of less than 32 weeks or a birth weight of less than 1500 gm. The sample consisted of 264 very preterm children (75.6% of German-speaking survivors) and 264 controls matched for gender,…