title: The effect of DSM-5 criteria on the developmental quotient in toddlers diagnosed with autism spectrum disorder.
abstract: OBJECTIVE
  To determine the effect of the changing fifth edition of the Diagnostic and Statistical Manual (DSM-5) criteria on the developmental profiles of children diagnosed with an Autism spectrum disorder (ASD).
  
  
  METHODS
  This study examines the effect of DSM-5 changes on impairment profiles of a population of 2054 at-risk toddlers aged 17-36 months using the Battelle Developmental Inventory, Second Edition.
  
  
  RESULTS
  Toddlers diagnosed with an ASD according to the DSM-5 were found to represent a more impaired population compared to those who qualified for a diagnosis of an ASD based on the DSM-IV-TR, but not the DSM-5. The group diagnosed according to the DSM-IV-TR represented a population of toddlers who were more impaired than atypically developing peers.
  
  
  CONCLUSIONS
  The proposed changes to the DSM will likely result in those diagnosed with an ASD according to the new criteria representing a more functionally impaired group. Implications of this proposed change are discussed.
authors.affiliation: Department of Psychology, Louisiana State University, Baton Rouge, LA 70803, USA. nturyg1@tigers.lsu.edu
authors.forename: Nicole
authors.initials: N
authors.lastname: Turygin
authors.forename: Johnny L
authors.initials: JL
authors.lastname: Matson
authors.forename: Jennifer
authors.initials: J
authors.lastname: Beighley
authors.forename: Hilary
authors.initials: H
authors.lastname: Adams
mesh_terms: D057189:Checklist; D002659:Child Development Disorders, Pervasive / Q000175:diagnosis*; D002675:Child, Preschool; D002658:Developmental Disabilities / Q000175:diagnosis; D003937:Diagnosis, Differential; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male