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This study examined exploratory behaviors used by 12 infants who were congenitally blind and 12 infants who were sighted to note similarities and differences in exploration. By including both groups of infants and matching the infants by age and their mothers' education, direct comparisons could be made between the groups. No differences were found between the two groups for 11 of 12 exploratory behaviors. The only behavior that was significantly different was pushing. Thus, the development of many exploratory behaviors was found not to be dependent on vision.

A within-subject reversal design was employed in a sheltered workshop to assess the effects of differential reinforcement of other behavior (DRO) in reducing inappropriate verbalizations by a severely retarded adult with Down's syndrome. (Author/CL)