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Autism Spectrum Disorder Measures


There are a variety of tools for measuring symptoms of Autism Spectrum Disorder (ASD) that have been developed and published. Some were designed to help with screening and/or diagnosis, while others were developed for gathering clinical information about individuals with a known diagnosis of ASD. The following table outlines the large variety of ASD tests available. Those having to do with screening and diagnosis that are commercially available (or widely adopted by being freely available on the Internet) are also individually reviewed elsewhere in the CAR Autism Roadmap™.

Screening or Diagnostic Measures

Name Authors Format Publisher
Asperger Syndrome Diagnostic Scale (ASDS) Miles et al., 2001 Questionnaire Pro-Ed, Inc.
Autism Behavior Checklist (ABC; part of the ASIEP below) Krug et al., 1978 Questionnaire Pro-Ed, Inc.
Autism Diagnostic Interview – Revised (ADI-R) LeCouteur et al., 2003 Semi-structured Interview Western Psychological Services
Autism Diagnostic Observation Schedule, 2nd Edition (ADOS-2) Lord et al., 2012 Direct Assessment Western Psychological Services
Autism Observation Scale for Infants (AOSI) Bryson et al., 2007 Direct Assessment Not commercially available
Autism Spectrum Rating Scale Goldstein & Naglieri 2010 Questionnaire

Western Psychological Services,


Autism Spectrum Screening Questionnaire (ASSQ) Ehlers et al., 1999 Questionnaire Not commercially available
Checklist for Autism in Toddlers (CHAT) Baron-Cohen et al., 1992 Questionnaire and Direct Assessment Not commercially available
Childhood Autism Rating Scale – Second Edition (CARS2) Schopler et al., 2010 Questionnaire Western Psychological Services
Early Screening for Autism and Communication Disorders (ESAC) Wetherby et al., 2009 Questionnaire Not commercially available
Early Screening of Autistic Traits (ESAT) Dietz et al., 2006 Questionnaire Not commercially available
Gilliam Asperger Disorder Scale (GADS) Gilliam 2001 Questionnaire Western Psychological Services
Gilliam Autism Rating Scale, 3rd Edition (GARS-3) Gilliam 2013 Questionnaire Western Psychological Services
Infant Toddler Checklist (ITC) Wetherby & Prizant 2002 Questionnaire Brookes Publishing Co., and freely available on the Internet
Krug Asperger's Disorder Index (KADI) Krug and Arick, 2003 Questionnaire Western Psychological Services
Modified Checklist for Autism in Toddlers, Revised with Follow Up (M-CHAT-R/F) Robins et al., 2009 Questionnaire Freely available on the Internet
Pervasive Developmental Disorders Screening Test – II (PDDST-II) Siegel (2004) Series of Questionnaires Pearson
Screening Tool for Autism in Two-Year-Olds (STAT) Stone et al., 2000 Direct Assessment VU e-Innovations (Vanderbilt University)
Social Communication Questionnaire (SCQ) Rutter et al., 2003 Questionnaire Western Psychological Services
Social Responsiveness Scale, 2nd Edition (SRS-2) Constantino 2012 Questionnaire Western Psychological Services

Measures of Comorbid Difficulties

Name Authors Format Publisher
Aberrant Behavior Checklist, 2nd Edition (ABC-2) Aman and Singh, 2017 Questionnaire

Slosson Educational Publications

Stoelting Co.

Autism Comorbidity Interview – Present and Lifetime Versions (ACI-PL) Leyfer et al., 2006 Semi-structured Parent Interview Not commercially available
Brief Infant Toddler Social Emotional Assessment (BITSEA) Briggs-Gowan et al., 2004 Questionnaire Mapi Research Trust
Child Behavior Checklist (CBCL) Achenbach and Rescorla 2000 Questionnaire Achenbach System of Empirically Based Assessment
Developmental Behavior Checklist, 2nd Edition (DBC-2) Gray et al., 2018 Questionnaire Western Psychological Services
Infant Toddler Social Emotional Assessment (ITSEA) Briggs-Gowan and Carter, 1998 Questionnaire Mapi Research Trust
Psychopathology in Autism Checklist (PAC) Helverschou et al., 2009 Questionnaire Not commercially available

Autism-specific Educational Assessments

Name Authors Format Publisher
Autism Screening Instrument for Educational Planning, 3rd Edition (ASIEP-3) Krug et al., 2008 Questionnaire and Direct Assessment

Pro-Ed, Inc.

Western Psychological Services

Psychoeducational Profile, 3rd Edition (PEP-3) Schopler et al., 2005 Direct Assessment

Pro-Ed, Inc.

Western Psychological Services

TEACCH Transition Assessment Profile (T-TAP) Mesibov et al., 2007 Direct Assessment Pro-Ed, Inc.

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The Center for Autism Research and The Children's Hospital of Philadelphia do not endorse or recommend any specific person or organization or form of treatment. The information included within the CAR Autism Roadmap™ and CAR Resource Directory™ should not be considered medical advice and should serve only as a guide to resources publicly and privately available. Choosing a treatment, course of action, and/or a resource is a personal decision, which should take into account each individual's and family's particular circumstances.