title: Recognition and classification of psychopathology in preschool children.
abstract: OBJECTIVE
  The aim of this paper is to offer a critical overview of research on preschool psychopathology, and to propose a working classification based on the empirical evidence.
  
  
  METHODS
  All of the existing factor and cluster analytic studies, and those studies that attempted to establish the reliability and validity of the subcategories in preschool behaviour disorder were reviewed. Applicability of the current classifications (DSM-IV and ICD-10) to preschool age was examined.
  
  
  RESULTS
  Empirical evidence suggests a well-established, externalising and internalising dichotomy, and a developmental problems factor where the instrument included these problems. There was also a strong tendency for the externalising and internalising symptoms to overlap. Within the externalising factor, there is evidence suggesting that attention deficit hyperactivity should be separated out and recognised. Categories in the DSM-IV and ICD-10 classification did not correspond with the statistically derived groups.
  
  
  CONCLUSIONS
  A classification of preschool psychopathology that incorporates the age-specific disorders and risk factors is proposed. This is likely to increase the awareness of researchers, taxonomists and clinicians of psychopathology in preschool children, thereby leading to an early recognition.
authors.affiliation: Rush-Presbyterian-St Luke's Medical Center, Section of Child Psychiatry, Chicago, Illinois 60612, USA.
authors.forename: M N
authors.initials: MN
authors.lastname: Pavuluri
authors.forename: S L
authors.initials: SL
authors.lastname: Luk
mesh_terms: D019958:Attention Deficit and Disruptive Behavior Disorders / Q000145:classification; D002653:Child Behavior Disorders / Q000145:classification; D002665:Child Psychiatry / Q000592:standards*; D002675:Child, Preschool; D016000:Cluster Analysis; D019317:Evidence-Based Medicine / Q000592:standards; D005163:Factor Analysis, Statistical; D006801:Humans; D001523:Mental Disorders / Q000145:classification*; D009497:Neurotic Disorders / Q000145:classification; D015203:Reproducibility of Results; D009626:Terminology as Topic