In the early 20th century, however, work on psychiatric diagnosis went into eclipse as a result of the influence of the psychoanalytic theories developed by Sigmund Freud and his followers.

• 不过到了20世纪初期，佛洛伊德与追随者发展出精神分析理论，在他们的影响之下，精神疾病诊断研究没落了。