Clinical psychology a branch of psychology concerned with the practical application of research methodologies and findings in the diagnosis & treatment of mental disorders.

Clinical psychologists classify their basic activities under three main headings: assessment (including diagnosis), treatment, and research. In assessment,clinical psychologists administer and interpret psychological tests, either for the purpose of evaluating individuals’ relative intelligence or other capabilities or for the purpose of eliciting mental characteristics that will aid in diagnosing a particular mental disorder. The interview, in which the psychologist observes, questions, and interacts with a patient, is another tool of diagnosis.

Clinical psychologists work in a variety of settings, including hospitals, clinics, and corporations, and in private practice. Some specialize in working with mentally or physically handicapped persons, prison inmates, drug and alcohol abusers, or geriatric patients.