| Trauma-informed care requires methods to assess and improve therapist competence. Ergo, this study validated a self-report measure of therapist competence in Trauma-Focused Cognitive Behavioral Therapy (TF-CBT): the TF-CBTClinicalSkills Questionnaire (TCSQ). Clinicians (N= 120) completed the TCSQ during Community-Based Learning Collaboratives (CBLCs).After empirical winnowing viainternal and external criteria, the TCSQ scale and subscales had good-to-excellent internal consistency (αs= .86–.95) and significant small-to-medium correlations with an objective measure of TF-CBT knowledge (rs = .23–.35). Large, significant pre-to post-CBLC changes were also found for overall self-efficacy with TF-CBT(p< .001,ηp2= .53) and all three TF-CBT competence domains(ds= 1.00–1.02), p < .001). Results support the TCSQ’s psychometrics, pragmatics, and clinical utility and further validate the CBLCas an implementation model in community mental health settings, particularly for trauma-informed care of youth and their families. Keywords: competence, Trauma-Focused Cognitive Behavioral Therapy, Learning Collaboratives, skills, knowledge, self-efficacy, measurement |