Although they have limited academic ability, mentally retarded children may be quite adept at social interaction or physical, artistic, or other tasks. Research was conducted to examine the creative, self-concept, and impulsive characteristics of MR pupils and to examine and compare, as to age and intellectual development, the performance of both…

A study was conducted to clarify a number of issues related to Piaget's theory of invariant sequantiality in child cognitive development. Ss were 143 middle-class white children of bright, average and retarded psychometric abilities (measured by performance on the Stanford-Binet Intelligence Test). Bright and average Ss were chronologically aged…