title: Autism severity as a predictor of inattention and impulsivity in toddlers.
abstract: OBJECTIVE
  Evaluate how severity of autism spectrum disorder (ASD) symptoms predicts attention-deficit/hyperactivity disorder (ADHD) symptoms in atypically developing toddlers.
  
  
  METHODS
  Parents/caregivers of 2300 atypically developing toddlers' ages 18-37 months were assessed about their children's behaviours using the Baby and Infant Screen for Children with aUtIsm Traits (BISCUIT) Part 1 and the inattention/impulsivity subscale of the BISCUIT-Part 2.
  
  
  RESULTS
  ASD symptom severity was positively and significantly correlated with inattention/impulsivity, indicating that children with more severe symptoms of ASD tended to have higher scores on the measure of inattention/impulsivity, R(2) = 0.49, F (1, 2298) = 2234.72, p < 0.001. Additionally, ASD symptom severity significantly predicted inattention/impulsivity, β = 0.70, t (2298) = 47.27, p < 0.001.
  
  
  CONCLUSIONS
  ASD symptom severity predicts rates of ADHD symptoms in atypically developing toddlers. The implications of these findings are discussed in the context of other research.
authors.affiliation: a Department of Psychology , Louisiana State University , Baton Rouge , LA , USA.
authors.forename: Kim
authors.initials: K
authors.lastname: Tureck
authors.affiliation: a Department of Psychology , Louisiana State University , Baton Rouge , LA , USA.
authors.forename: Johnny L
authors.initials: JL
authors.lastname: Matson
authors.affiliation: a Department of Psychology , Louisiana State University , Baton Rouge , LA , USA.
authors.forename: Paige
authors.initials: P
authors.lastname: Cervantes
authors.affiliation: a Department of Psychology , Louisiana State University , Baton Rouge , LA , USA.
authors.forename: Nicole
authors.initials: N
authors.lastname: Turygin
mesh_terms: D001288:Attention; D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications / Q000175:diagnosis*; D000067877:Autism Spectrum Disorder / Q000150:complications / Q000175:diagnosis*; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007175:Impulsive Behavior; D007223:Infant; D008297:Male; D012720:Severity of Illness Index
keywords: Attention-deficit/hyperactivity disorder; Baby and Infant Screen for Children with aUtIsm Traits (BISCUIT); autism spectrum disorders; inattention