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Kelmanson, Igor A. – Early Child Development and Care, 2017
The study was performed in St. Petersburg in 2015 and comprised 34 children with diagnosed Down's syndrome (DS) aged 9-15 (mean 11) years (17 boys, 17 girls) who attended special schools. Control group was made up of 34 clinically healthy normal intelligence schoolchildren matched for age, sex and geographical distribution. The mothers were…
Descriptors: Sleep, Down Syndrome, Scores, Attention Deficit Hyperactivity Disorder
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Dodonova, Yulia A.; Dodonov, Yury S. – Intelligence, 2012
The relationships between processing speed, intelligence, and school achievement were analyzed on a sample of 184 Russian 16-year-old students. Two speeded tasks required the discrimination of simple geometrical shapes and the recognition of the presented meaningless figures. Raven's Advanced Progressive Matrices and the verbal subtests of…
Descriptors: Cognitive Processes, Intelligence, Academic Achievement, Adolescents