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Kegel, Cornelia A. T.; Bus, Adriana G. – Journal of Child Psychology and Psychiatry, 2013
Background: The dopamine D4 receptor gene (DRD4) has been linked to attention deficit hyperactivity disorder (ADHD) and reading disorders. In this study, we examined whether diminished anticipatory dopamine cell firing--typical of the long variant of the DRD4 allele--is related to emergent and advanced alphabetic skills, and whether executive…
Descriptors: Genetics, Executive Function, Attention Deficit Hyperactivity Disorder, Correlation
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Folmer-Annevelink, Elvira; Doolaard, Simone; Mascareno, Mayra; Bosker, Roel J. – Journal of Classroom Interaction, 2010
This paper addresses the relationship between class size and student-teacher interactions as an explanation for effects of class size on achievement. Observations were conducted in kindergarten and Grade 1 classes from 46 Dutch primary schools in order to address the effect of class size on the amount and type of student-teacher interactions. The…
Descriptors: Class Size, Grade 1, Elementary School Students, Foreign Countries