This article examines how international differences in age-grade distributions and grade effects contribute to science scores among 27 Organization for Economic Cooperation and Development countries. As shown in the 2006 Program for International Student Assessment, countries vary substantially in the grade distribution of 15-year-olds. The costs…

The criterion validity of the primary, elementary, and intermediate school forms of the Otis-Lennon School Ability Test (OLSAT) in an Australian context was studied. Results with about 8,000 children in grades 1 through 8 support the criterion validity of the OLSAT for Australian samples. (SLD)

Characteristics related to help-seeking (perceived competence, motivational orientation, attitudes and beliefs, and age) were examined for 177 children in grades 3, 5, and 7. By grade seven, positive and negative attitudes were influential. Developmental and individual difference factors are discussed in connection with help-seeking and academic…

Forty-five boys and 45 girls in grades 5, 8, and 11 from schools for academically gifted students and 90 students in the same grades from regular schools described their uses of 14 self-regulated learning strategies and estimated their verbal and mathematical efficacy. Results support a triadic view of self-regulated learning. (SLD)