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Bathurst, Kay; Gottfried, Allen W. – Child Development, 1987
The developmental significance of unresponsive or uncooperative behavior of children in standardized developmental assessments made during the preschool years was investigated. Untestable children were significantly lower than testable children on a wide range of abilities at all ages from 12 through 72 months. (PCB)
Descriptors: Behavior Problems, Child Development, Longitudinal Studies, Research Problems