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Adams, Russel L.; Phillips, Beeman N. – Child Development, 1972
When differences in level of motivation were controlled, all of the previously found differences between firstborn and later born disappeared. (Authors)
Descriptors: Academic Achievement, Birth Order, Comparative Analysis, Elementary School Students

Hagen, John W.; And Others – Child Development, 1990
Cognitive ability of nondiabetic children and early and late onset diabetic children was compared. Diabetic children scored in the normal range in intelligence and academic performance, but showed evidence of school difficulties and memory deficiencies. Children's perceived self-competence and parents' reports of children's functioning and…
Descriptors: Academic Achievement, Adolescents, Age Differences, Competence