Abstract
This experiment studied the effect of extraneous auditory stimulation on the performance of familial and brain-injured retardates. Brain-injured retardates were matched with familial retardates for chronological age, IQ, race, and sex. The results were discussed in reference to: (1) the value of the dichotomus medical diagnosis of brain-injured versus familial retardates for prediction of performance; (2) the hypothesis that the so-called distractibility is an attempt by the brain-injured to sustain his “normal” level of stimulation; and (3) the advisability of using an enriched environment in teaching the brain-injured retardate.
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