The Symposium organized annually by the Working Group for the supervision of clinical cases with children and adolescents of the College of Psychologists of the Valencian Community, with more than 600 registered participants, this time had the objective of reviewing empirically supported treatments in the child and adolescent population and in particular the transdiagnostic approach, and to present the process of assessment, diagnosis and intervention in four clinical cases in the child and adolescent population. Mireia Orgilés, gave the keynote lecture entitled “Transdiagnostic interventions in the child population: From research to clinical practice” and then four professionals presented clinical cases on psychotherapy in adolescents, suicidal behavior and generalized anxiety.