title: Analysis on evolution and research focus in psychiatry field.
abstract: BACKGROUND
  With the dramatic rise in mental disorders and mental illnesses, psychiatry has become one of the fastest growing clinical medical disciplines. This has led to a rise in the number of scientific research papers being published in this field.
  
  
  METHODS
  We selected research papers in ten psychiatric journals that were published during 1983 to 2012. These ten journals were those with the top Impact Factor (IF) as indicated by the Science Citation Index Expanded (SCI-Expanded). We utilized information visualization software (CiteSpace) to conduct co-citation and Hierarchal clustering analysis to map knowledge domains to determine the evolution and the foci of research in this field.
  
  
  RESULTS
  In the evolution of the field of psychiatry, there were four stages identified. The result of hierarchal clustering analysis revealed that the research foci in the psychiatric field were primarily studies of child and adolescent psychiatry, diagnostic and classification criteria, brain imaging and molecular genetics.
  
  
  CONCLUSIONS
  The results provide information about the evolution and the foci of the research in the field of psychiatry. This information can help researchers determine the direction of the research in the field of psychiatry; Moreover, this research provides reasonable suggestions to guide research in psychiatry field and provide scientific evidence to aid in the effective prevention and treatment of mental disorders.
authors.affiliation: School of Public Health, Shanxi Medical University, South Xinjian Road, Taiyuan, China. wuguaiguai9896@sohu.com.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.affiliation: School of Public Health, Shanxi Medical University, South Xinjian Road, Taiyuan, China. dzg52827@aliyun.com.
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Duan
mesh_terms: D016000:Cluster Analysis; D006801:Humans; D055811:Journal Impact Factor; D001523:Mental Disorders / Q000145:classification / Q000175:diagnosis / Q000628:therapy; D011570:Psychiatry / Q000379:methods / Q000639:trends; D011643:Publishing; D012106:Research / Q000706:statistics & numerical data / Q000639:trends