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Ackerman, Brian P.; Brown, Eleanor; Izard, Carroll E. – Child Development, 2003
Identified groups of economically disadvantaged children showing high externalizing behavior in first grade that persisted (persistent) or decreased (improver) in third grade, or low first- grade levels that were stable (unproblematic) or increased (new problem) in third grade. Found that verbal ability, behavioral impulsivity, parent…
Descriptors: Behavior Problems, Child Behavior, Children, Comparative Analysis