title: Developmental delays in children with ADHD.
abstract: OBJECTIVE
  ADHD is often comorbid with other disorders, but it is often assumed that academic, language, or motor c skills problems are secondary to ADHD rather than that attention problems are secondary to the other disorder or both disorders have a shared etiology. We assessed for comorbid developmental disorders and which cognitive processes were impaired in children with ADHD.
  
  
  METHODS
  Measures of intelligence, language, motor skills, social cognition, and executive functions were administered to children with ADHD (n = 53) and age/sex-matched typical children.
  
  
  RESULTS
  Clinically significant deficits were 2 to 7 times as common in children with ADHD as in typical children, and the structure of ability differed in the two groups. Abilities were less differentiated in children with ADHD.
  
  
  CONCLUSIONS
  The results indicate a need for comprehensive screening for developmental disorders in children with ADHD and imply that research needs to focus on how ADHD and developmental disorders may share an etiology.
authors.affiliation: School of Applied Psychology, Griffith University, Gold Coast, Queensland, Australia m.dyck@griffith.edu.au.
authors.forename: Murray J
authors.initials: MJ
authors.lastname: Dyck
authors.affiliation: School of Psychology and Speech Pathology, Curtin University, Perth, Western Australia.
authors.forename: Jan P
authors.initials: JP
authors.lastname: Piek
mesh_terms: D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis* / Q000453:epidemiology*; D002648:Child; D015897:Comorbidity; D002658:Developmental Disabilities / Q000175:diagnosis* / Q000453:epidemiology*; D056344:Executive Function; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis* / Q000453:epidemiology*; D007360:Intelligence; D007802:Language; D007806:Language Disorders / Q000175:diagnosis / Q000453:epidemiology; D008297:Male; D009048:Motor Skills