Mental disorders as discrete clinical conditions : dimensional versus categorical classification / Thomas A. Widiger and Whitney L. Gore -- The problem of dual diagnosis / Melanie E. Bennett, Jason Peer, and Selvija Gjonbalaj-Marovic -- Structured and semistructured interviews for differential diagnosis : fundamentals, applications, and essential features / Daniel L. Segal, Anne E. Mueller & Frederick L. Coolidge -- Impact of race and ethnicity on the expression, assessment, and diagnosis of psychopathology / Susan Tinsley Li, Sandra Jenkins, and Sophia Grewal.