Physical aggression and language ability from 17 to 72 months: cross-lagged effects in a population sample.

Inspection of the bivariate correlations reveals marginally significant associations between physical aggression and language ability at varying times, consistent with previous studies of normally developing children.

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Since the chi-square test is likely to be significant with large samples [57] , we also provide approximate indices of fit including the root mean square error of approximation (RMSEA) [58] and the comparative fit index (CFI) [59] .

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