This study examined the effectiveness of attachment and trauma-focused treatment with children and adolescents who qualified for the diagnosis of reactive attachment disorder (RAD). Children and adolescents with the diagnosis of RAD typically exhibit many antisocial behaviors that can be difficult to resolve and can often impact families, society, and the criminal justice system. For this study (n = 71), children and adolescents who qualified for the diagnosis of RAD were selected from an outpatient treatment center where they and their parents completed an intensive psychotherapeutic treatment program specifically designed to treat and resolve maladaptive symptoms that are associated with an RAD diagnosis. All 71 participants were treated with an integrative therapeutic trauma-informed approach. The parents completed the Child Behavior Checklist (CBCL), now titled the Achenbach System of Empirically Based Assessment, and the Randolph Attachment Disorder Questionnaire (RADQ) at the beginning and conclusion of treatment. Results showed a significant decrease in symptoms in all six of the DSMoriented scales of the CBCL and seven of eight syndrome scales and no significant differences on the CBCL competence scales. Moreover, results also showed a significant decrease in attachment-related symptoms on the RADQ. Findings are discussed in terms of providing effective, appropriate treatment and positive social change for children and adolescents diagnosed with RAD. [ABSTRACT FROM AUTHOR]