Peer Conflict Scale
The Peer Conflict Scale (PCS) is a copyright protected 40-item questionnaire designed to assess aggressive behavior in children and adolescents. The scale has items assessing Physical Proactive Aggression, Physical Reactive Aggression, Relational Proactive Aggression and Relational Reactive Aggression. There are three versions of the scale: Youth Self-Report, Parent Report, and Teacher Report. Researchers can download and use the PCS free of charge in their work. My only request is that copies of any publications using the PCS are sent to me at firstname.lastname@example.org.
There is no manual for the PCS. Several studies which describe the development of the scale, its subscale structure, and initial tests of its validity can be obtained here.
Crapanzano, A.M., Frick, P.J., & Terranova, A. M. (2010). Patterns of physical and relational aggression in a school-based sample of boys and girls. Journal of Abnormal Child Psychology, 38, 433-445.
Munoz, L.C., Frick, P.J., Kimonis, E.R., & Aucoin, K.J. (2008). Types of aggression, responsiveness to provocation, and callous-unemotional traits in detained adolescents. Journal of Abnormal Child Psychology, 36, 15-28.
Marsee, M.A., Barry, C.T., Childs, K.K., Frick, Paul J., Kimonis, E.R., Munoz, L., Aucoin, K.J., Kunimatsu, M.M., Fassnacht, G.M., & Lau, K.S.L. (2011). Assessing the forms and functions of aggression using self-report: Factor structure and invariance of the Peer Conflict Scale in youth. Psychological Assessment, 23, 792-804.
Marsee, M.A., & Frick, P.J. (2007). Exploring the cognitive and emotional correlates to proactive and reactive aggression in a sample of detained girls. Journal of Abnormal Child Psychology, 35, 969-981.