ทำไมต้องไล่กูไปอ่าน DSM วะ wikipedia ก็มีบอก
http://en.wikipedia.org/wiki/Diagnostic_and_Statistical_Manual_of_Mental_Disorders
The revisions of the DSM from the 3rd Edition forward have been mainly concerned with diagnostic reliability
For example Major Depressive Disorder a common mental illness had a poor reliability Kappa statistic of 0.28 indicating that clinicians frequently disagreed on this diagnosis in the same patients. The most reliable diagnosis was Major Neurocognitive Disorder with a Kappa of 0.78
คนที่มาถามหาไม่คิดจะกูเกิ้ลก่อนถามบ้างเลยเหรอวะ