Using effect sizes from Erford, Paul, Oncken, Kress, & Erford (2014) meta-analysis for treatments of oppositional defiant disorder and Erford, Bardhoshi, Ross, Gunther, & Duncan (2017) meta-analysis of conduct problems in school-aged youth, the 6 most commonly used disruptive behavior instruments were analyzed for practical and technical strengths and weaknesses, and best use recommendations for screening and counseling outcome research were provided. The instruments included the Achenbach System of Empirically-Based Assessment (ASEBA), Revised Behavior Problem Checklist, Self-Report Delinquency Checklist, Eyberg Child Behavior Inventory/Sutter-Eyberg School Behavior Inventory, Conners--3 Rating Scale, and Parent Daily Report.