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J Autism Dev Disord. 2009 Sep;39(9):1305-20. doi: 10.1007/s10803-009-0746-z. Epub 2009 May 5.

The Autism Diagnostic Observation Schedule-toddler module: a new module of a standardized diagnostic measure for autism spectrum disorders.

Author information

  • 1University of Michigan Autism and Communication Disorders Center, Ann Arbor, MI, USA. luyster@chgr.mgh.harvard.edu

Abstract

The Autism Diagnostic Observation Schedule (ADOS; Lord et al., J Autism Dev Disord, 30(3):205-223, 2000) is widely accepted as a "gold standard" diagnostic instrument, but it is of restricted utility with very young children. The purpose of the current project was to modify the ADOS for use in children under 30 months of age. A modified ADOS, the ADOS Toddler Module (or Module T), was used in 360 evaluations. Participants included 182 children with best estimate diagnoses of ASD, non-spectrum developmental delay or typical development. A final set of protocol and algorithm items was selected based on their ability to discriminate the diagnostic groups. The traditional algorithm "cutoffs" approach yielded high sensitivity and specificity, and a new range of concern approach was proposed.

PMID:
19415479
[PubMed - indexed for MEDLINE]
PMCID:
PMC2893552
Free PMC Article
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