Many individuals with autism spectrum disorders (ASD) display stimulus overselectivity, wherein a subset of relevant components in a compound stimulus controls responding, which impairs discrimination learning. The original experimental research on stimulus overselectivity in ASD was conducted several decades ago; however, interventions for…

This experimental study has three aims: (1) to give a detailed description of imitative behavior as it develops during the first six months of life; (2) to compare imitative responses perceived through visual, kinesthetic and auditory modalities; and (3) to describe and explain the regulating mechanisms and processes present in the early…

The following research projects are described in this annual report: (1) "Concept Learning in Discrimination Tasks," which indicates that kindergarten children are able to discriminate the letters "b,""d,""p," and "q"; (2) "Discrimination of Letter-like Forms," indicating that nursery…

The research reported in this symposium paper attempts to underline a Piagetian distinction concerning object concept which has tended to be ignored by psychologists working along Piagetian lines. More specifically, this research tested the hypothesis that intellectual development plays a role in the development of stranger reactions. The subjects…