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Amanda W. Harrist, Anthony F. Zaia, John E. Bates, Kenneth A. Dodge, Gregory S. Pettit, Subtypes of Social Withdrawal in Early Childhood: Sociometric Status and Social-Cognitive Differences across Four Years, Child Development, Vol. 68, No. 2 (Apr., 1997), pp. 278-294
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Harrist et al. (1997) studied this question.
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