EXT). First, we set the CONT to be the reference category (this provided three of the four contrasts). Next, we set the INTs to be the reference category to compare INT with EXT (three contrasts were always computed at once, although we used only one in this analysis). We used primary caregiving parents’ reports (including mostly mothers but a few fathers) of EC, impulsivity, or emotionality when predicting mother- or teacher-reported problem behavior groups. We used only mothers’ report of control or emotionality when predicting problem behavior groups on the basis of fathers’ report to ensure that these analyses were across reporters. Only individuals with at least some T3 data were included (and any missing data for these children were imputed).
