Original Paper

Journal of Autism and Developmental Disorders

, Volume 42, Issue 1, pp 82-93

New Autism Diagnostic Interview-Revised Algorithms for Toddlers and Young Preschoolers from 12 to 47 Months of Age

  • So Hyun KimAffiliated withUniversity of Michigan Autism and Communication Disorders Center (UMACC) Email author 
  • , Catherine LordAffiliated withUniversity of Michigan Autism and Communication Disorders Center (UMACC)

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Autism Diagnostic Interview-Revised (Rutter et al. in Autism diagnostic interview-revised. Western Psychological Services, Los Angeles, 2003) diagnostic algorithms specific to toddlers and young preschoolers were created using 829 assessments of children aged from 12 to 47 months with ASD, nonspectrum disorders, and typical development. The participants were divided into three more homogeneous groups by language level and age. Items that best differentiated the diagnostic groups were selected and arranged into domains based on multifactor item-response analyses. Using the new algorithms for toddlers and preschool children, we were able to improve sensitivity and specificity compared to the previously developed algorithm.


Autism Autism spectrum disorders ADI-R Toddler Preschool children Diagnosis