title: MA changes in institutionalized Down's syndrome persons: a semi-longitudinal approach.
abstract: A semi-longitudinal approach was employed in this partial replication of a larger study of MA changes in institutionalized retarded persons (Fisher & Zeaman, 1970). Curves were fitted to MA data for a Down's syndrome group and a group of retarded subjects matched on the basis of initial Ma and CA. The findings generally replicated those of the earlier study. Specifically, the results of a multiple regression/correlation analysis indicated that the two curves were similar in shape, but differed with respect to height.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000523:psychology*; D006801:Humans; D007360:Intelligence; D008137:Longitudinal Studies; D008875:Middle Aged