Social Interactions of Retarded Children: Generalization from Mainstream to Special School

Seven IH children attending a special school were integrated into a mainstream school on a part‐time basis over a period of 18 weeks. Effects were evaluated using behavioural measures of activity participation and social interactions during class time and free‐play periods in both the mainstream school and the special school which the children continued to attend. Compared to IH children who remained in the special school, the integrated children showed larger increases in Associative play in the special school free‐play period, but no differential change in classroom behaviour. In the mainstream school, social interactions between IH and non‐handicapped children occurred at high levels in both class and playground periods.     

Habituation and recovery of orienting in rats as a function of stimulus significance

Three experiments measured orienting of rats to stimuli varying in intrinsic significance. In the first, rats showed greater reactivity to a recording of a conspecific’s distress squeal than to a simulated mimic squeal when the stimuli were presented at 100 dB but not at 80 dB, and orienting to all stimuli habituated rapidly with repeated stimulus exposures. Experiment 2 showed that, following several stimulus exposures, recovery of orienting after rest periods of 1 and 7 days was a function of the stimulus: Orienting to the distress squeal presented at 100 dB recovered more rapidly than did orienting to the mimic squeal at 100 dB or to either the mimic or the distress squeal presented at 80 dB. Experiment 3 showed that habituation to the most significant stimulus, the distress squeal presented at 100 dB, was retarded at long (24-h) interstimulus intervals, presumably a consequence of less stimulus-to-stimulus transfer of habituation with this stimulus. The results are discussed in terms of biological constraints on habituation of orienting and on recovery of orienting following habituation.