The Diagnostic and Statistical Manual of Mental Disorders, better known as the DSM, governs the tricky science of psychiatric diagnosis. But this gold standard of diagnosis is anything but infallible: as knowledge of mental disorders grows, successive editions have had to change their definitions. The fifth version, due to be published next year, is already drawing criticism—and the most recent attack comes from within the DSM-5’s ranks.
Roel Verheul and John Livesley, a psychologist and psychiatrist who were members of the DSM-5 work group for for personality disorders, found that the group ignored their warnings about its methods and recommendations. In protest, they resigned, explaining why in an email to Psychology Today. Their disapproval stems from two primary problems with the proposed classification system: its confusing complexity, and its refusal to incorporate scientific evidence.