This book presents the comprehensive statistical analyses of the major psychometric measures developed as part of the extensive Oregon Youth Study. This study, conducted by Dr. Gerald Patterson and a team of researchers over the past 15 years, followed a cohort of aggressive children from childhood through adolescence. This volume details the methods and the results of this extensive data set, refining the reliability and validity of the measurement instruments which were developed. It is essential material for any researcher wishing to compare or replicate the finding of this important longitudinal study. TOC:Contents: Introduction.- Academic Skills.- Deviant Peers.- Early Problems with the Target Child.- Parent Depression.- Peer Relations.- Positive Parenting: Parent Involvement.- Positive Parenting: Positive Reinforcement.- Child Self-Esteem.- Parental Stress.- Monitoring.- Child Depressed Mood.- Antisocial Behavior.- Discipline.- Problem-Solving.- References.- Appendix.