Study found that stimulus presence during a delay of reinforcement interval enhanced performance, and to a large extent prevented the usual delay-produced decrement. (Authors)

Results reaffirm the notion that retarded individuals are less adept at recognizing familiar forms haptically than visually. (Author)

A combination of readiness and body-part training was the most effective in producing number conservation with external objects. (Authors)

In a naturalistic behavioral stdy, it was found that prematures have significantly more endogenous smiling than full-term newborns. (Authors)

Results indicate that the test-retest stability of the DDST is quite satisfactory for a screening test. (Authors/MB)

Author concludes that a Piagetian based paper-and-pencil technique can be successfully used for older subjects rather than the conversation-interview technique used for elementary school children. (MB)

Middle-class teachers were significantly more permissive and less puritanical in outlook, took more pleasure in the emotional aspects of teacher-pupil relationships, and showed less authoritarian attitudes toward children than did lower-class teachers. (Author/MB)

Aim of the study is to assess empirically the interrelationships among some of Piaget's and Gesell's behavioral tasks. (Author)