This volume, the first to specifically address the function of psychologists as practitioners and scientists in medical settings, presents a range of approaches to assessment and diagnostic practice rather than a litany of specific tools, diseases, or diagnostic problems. The comprehensive discussion, augmented by 41 case studies, addresses the psychological assessment of patients and their families using traditional neuropsychological and psychological diagnostic tools in various topic areas and settings. The application of assessment to issues such as ethics and law, professional self-assessment and credentialling, and the communication of diagnostic findings is also discussed.