The document discusses assessment and intervention in health psychology. It describes the goals of assessment as differentiating physical and psychological causes of illness, aiding diagnosis, understanding health-related behaviors, and monitoring treatment progress. Methods of assessment mentioned include questionnaires, observation, clinician ratings, and psycho-physiological measures. Personality traits and psychological distress are also assessed. Intervention approaches discussed include cognitive behavioral therapy, relaxation techniques, biofeedback, and combinations such as meditation and hypnosis.