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Peer reviewedSanz, M. T.; Menendez, J. – Early Child Development and Care, 1996
Studied how early treatment affected the development of a sample of 30 Down syndrome babies incorporated into the study at different ages. Found that development quotients descended significantly at 18 months of age as the period in treatment shortened. (AJH)
Descriptors: Age Differences, Child Development, Child Health, Downs Syndrome
Peer reviewedHindley, C. B.; Owen, C. F. – British Journal of Psychology, 1979
The case is made for basing analysis of longitudinal data on each subject's curve of scores. In this analysis of IQ scores from a longitudinal study, fitted curves yielded significant error reduction, rendering untenable the doctrine of IQ constancy. A visual method of curve classification is also presented. (Author/SJL)
Descriptors: Adolescents, Age Differences, Analysis of Variance, Child Development
