Psychopathology, the field concerned w/ the nature and dvlpt of abnormal bhvr, thoughts, and feelings. Abnormal behaviour, includes characteristics such as statistical infrequency, violation of norms, personal distress, disability or dysfunction, and unexpectedness. > statistical infrequency is used explicitly in diagnosing mental retardation. Disability, impairment in some important area of life b/c of an abnormality. > a phobia can produce both distress and disability (a severe fear of flying may prevent someone f/ taking a job promotion) Distress and disability are considered abnormal when they are unexpected responses to env t stressors (an anxiety disorder is diagnosed when the anxiety is unexpected and out of proportion to the situation) Clinician, the various professionals authorized to provide psychological services. Clinical psychologist requires a ph. d. (lab/research work, statistics, empiricism, dissertation) or psy. d. degree. > techniques of assessment and diagnosis of mental disorders, learning the skills necessary to determine that a patient s symptoms or problems indicate a particular disorder.