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Guided by Bronfenbrenner's (1977) ecological framework, we investigated the correlates of changes in early adolescents' emotional, conduct, social and academic difficulties over a 2-year period of time. A representative sample of Australian early adolescents (N = 3797, 51% boys) completed questionnaires and interviews when they were age 10 (T1) and two years later at age 12 (T2). Parents also participated...
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