id author title date pages extension mime words sentence flesch summary cache txt news-008084 Psychologist examines methods of classifying mental disorders | News | Notre Dame News | University of Notre Dame .html text/html 1095 41 47 Clark and her co-authors identified four challenges to understanding and classifying mental disorders: what varied combinations of factors cause them, how to diagnose them given that they are not actually distinct categories, thresholds for diagnosis and other purposes such as treatment, and co-morbidity — the fact that most people with mental illness meet the diagnosis for multiple mental disorders. Psychologist examines methods of classifying mental disorders | cache/news-008084.html txt/news-008084.txt