title: Externalizing and tantrum behaviours in children with ASD and ADHD compared to children with ADHD.
abstract: OBJECTIVE
  Compare rates of externalizing in children with autism spectrum disorder (ASD) and attention deficit/hyperactivity disorder (ADHD) symptoms to children with ADHD.
  
  
  METHODS
  Parents/caregivers of 85 children with ASD and/or ADHD were surveyed about their children's behaviours using the Autism Spectrum Disorders-Comorbidity for Children and the Autism Spectrum Disorders-Behaviour Problem for Children.
  
  
  RESULTS
  Specific main effects analyses were then conducted. Children with ASD exhibited a higher number of externalizing (F(1, 83) = 83.34, p < 0.001) and tantrum behaviours (F(1,83) = 781.86, p < 0.001) than children without ASD.
  
  
  CONCLUSIONS
  ASD exacerbates the externalizing symptoms of ADHD during childhood. This study adds to the literature on the importance of assessing for a wide-range of possible behaviour problems in children presenting with ADHD symptomatology. The implications of these findings are discussed in the context of other research.
authors.affiliation: Department of Psychology, Louisiana State University, Baton Rouge, LA 70803, USA.kturec1@lsu.edu
authors.forename: Kim
authors.initials: K
authors.lastname: Tureck
authors.forename: Johnny L
authors.initials: JL
authors.lastname: Matson
authors.forename: Anna
authors.initials: A
authors.lastname: May
authors.forename: Nicole
authors.initials: N
authors.lastname: Turygin
mesh_terms: D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000453:epidemiology* / Q000523:psychology*; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000453:epidemiology* / Q000523:psychology*; D002675:Child, Preschool; D003147:Communication Disorders / Q000453:epidemiology; D005260:Female; D006801:Humans; D007389:Internal-External Control; D008297:Male