A teacher rating scale of reactive aggression, proactive aggression, a
nd covert antisocial behavior was evaluated in a normative sample of t
hird- to fifth-grade predominantly white lower middle class boys (N =
186). Factor analysis revealed independent and internally consistent R
eactive Aggression (six reactive items), and Proactive Aggression (fiv
e proactive items five covert items) factors. Although the factors wer
e intercorrelated (r = .67), and each factor was significantly correla
ted with negative peer social status (r = .26 for each, controlling fo
r grade), the independence of the factors was supported by the unique
relation of Reactive Aggression with in-school detentions (r = .31), c
ontrolling for Proactive Aggression and grade. These results supported
the reliability and validity of Reactive and Proactive Aggression as
rated by teachers, which should facilitate further research of these c
onstructs.