Personality disorders are chronic and persistent behavioral and emotional disturbances that are often difficult to treat. Some professionals have argued that these disorders are not mental disorders at all, but personality styles?that these individuals are just odd or unusual. Review your textbook and a minimum of two peer-reviewed references and discuss the diagnostic and measurement challenges and issues related to personality disorders. What classification approach is currently used in the DSM? Explain this approach. Identify and discuss relevant research on the causation, diagnosis, and treatment of personality disorders.