Simple ks were estimated to examine if the classification of children into the T3 groups (CONT, INT, EXT, CO) was consistent across reporters. Simple ks for the relations between mothers’ and fathers’, mothers’ and teachers’, and fathers’ and teachers’ reports of maladjustment were .30, .19, and .25, respectively, ps < .001 (analogous findings were very similar at T1 and T2; Eisenberg, Sadovsky, et al., 2005). Simple ks were also used to examine the stability of ratings within reporter but across time. Simple ks from T1–T2, T1–T3, and T2–T3 were .41, .27, and .42, ps < .001, for mothers; .33, .21, and .33, ps < .001, for fathers; and .18, .15, and .36, ps < .001, for teachers, respectively. Table 3 presents the means and standard deviations of the predictors within the four problem behavior groups.2
