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Wehmeyer, Michael L. – American Journal on Mental Retardation, 1991
This study of 59 children (ages 1-3) at risk for severe mental retardation suggests that subjects exhibited repetitive motor behaviors topographically similar to those exhibited in typical infant development; there were significant age differences in expression of these behaviors; and a small percentage of these children exhibited atypical…
Descriptors: Age Differences, At Risk Persons, Behavior Development, Motor Reactions