The VT Autism Clinic provides diagnostic evaluations of Autism Spectrum Disorders for infants, children, adolescents and adults. Diagnostic evaluations include:

  • Standardized Parent Interview (Autism Diagnostic Interview-Revised; ADI-R)
  • Standardized Observation Measure (Autism Diagnostic Observation Schedule, Second Edition; ADOS-2)
  • Cognitive Assessment (e.g., Wechsler Preschool and Primary Scales of Intelligence (WPPSI),Wechsler Abbreviated Scales of Intelligence (WASI), Bayley Scales of Infant Development)
  • Vineland Adaptive Behavior Scales or Adaptive Behavior Assessment System (ABAS)
  • Language Assessment (Peabody Picture Vocabulary Test (PPVT) and Expressive Vocabulary Test (EVT))
  • Other measures as needed

We can also provide psychological and psychoeducational assessment (cognitive, memory, achievement, and attentional and emotional testing), learning disability assessments, and attention-deficit/hyperactivity disorder (ADHD) assessments. The primary goals of the comprehensive evaluation are to determine diagnosis, assess developmental skills, and obtain a complete understanding of the child in order to provide recommendations for treatment and service planning.

The evaluation typically consists of 6-9 hours divided over two to three appointments:

  • Day 1: Parent Interview (ADI-R) (parent only)
  • Day 2: ADOS-2, WASI (or comparable test), PPVT, EVT (child only)
  • Day 3: Supplementary assessment measures as needed


General information for ASD Diagnostic Evaluations

All ASD diagnostic evaluations are completed by graduate clinicians studying at the Virginia Tech Autism Clinic. Clients have the option of a simultaneous assessment by researchers with the Virginia Tech Center for Autism Research (VTCAR) allowing some of their data to be used for research purposes in a confidential Assessment Database. This means that you are allowing VTCAR to use your assessment data for research purposes and you are consenting to being contacted for possible participation in future research projects through VTCAR. You would not be under any obligation to participate in any future research; this just gives researchers the option to contact you to see if you are interested in participating in studies we conduct.

Costs start at $800 and may be discounted depending on client's income and assessments needed, based on a sliding scale. During this assessment, you would complete ASD measures and receive a full diagnostic report.  If there are other concerns that come up while completing the ASD assessment, then additional tests will be done so that the assessment is individualized to your concerns. In this assessment, we also contact other people, if applicable (for example, teachers or doctors) to try to get a bigger picture. Therefore, this assessment is comprehensive, and is considered a full clinical evaluation.

The assessment appointment has several parts and lasts about 4-9 hours. The person being assessed for ASD will complete cognitive assessments and an observation of their behaviors. Parents/caregivers will complete an interview so we may obtain a complete developmental history.

In order to proceed with this option, fill out information on our Registry. Once the Registry is completed, please contact us at or call 540-231-8747 to let us know, and we can provide you with further information.