Reviews empirical literature on comorbidity of anxiety and depressive disorders in youth, emphasizing prevalence of comorbidity, assessment and measurement difficulties, familial factors, and developmental differences. Examines nature of anxiety and depression in youth. Presents treatment recommendations from cognitive-behavioral framework. Notes components of treatment: affective education, enactive programing, addressing reinforcement difficulties, correcting cognitive distortions, and enhancing problem-solving skills. (Author/NB)