Tasks administered to sixty females 60-120 months of age show that it is possible to test for Piagetian logic by using problems structured in a social context and also suggest that the order of acquisition of logical operations with social stimuli is consistent with the order which has been established with the use of physical stimuli. (Author/CS)

Studies concerned with the synchronous emergence prediction of Piaget's structures-of-the-whole principle are discussed in conjunction with three groups of concrete-operational skills: (1) transitivity/conservation/class inclusion; (2) double classification/double seriation; and (3) ordinal, cardinal, and natural number concepts. Findings show…