Skip Menu

Return to Skip Menu

Main Content

Diagnostic Assessment

Diagnostic Assessment

For more information about any of our services, or to schedule an appointment, please contact our clinic.

Outline of assessment visit schedule

Our 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 hours divided over two 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

Options for assessments 


The first option would be to have an assessment through the Virginia Tech Center for Autism Research. In this assessment you would complete ASD measures and assessments and receive a diagnostic summary for your time. As a part of getting an assessment with VTCAR, your assessment data will be entered into the Assessment Database for research purposes. This means that you are allowing us 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 another study. 

The assessment appointment has two parts and lasts about 4 to 5 hours. Your child will complete cognitive assessments and an observation of their behaviors. While your child is completing assessments, you will be doing a parent interview so we may obtain a complete developmental history.

Please note that in this assessment, we only assess for ASD. We do not assess for other disorders. However, if we do notice other possible concerns, we will provide referrals for additional evaluations either at Virginia Tech or elsewhere. If you opt for additional evaluation at one of our referred VT clinics, you are eligible for a discounted rate starting at $450 or lower (the full price is usually $700).

In order to proceed with this option, we would need you to fill out information on our Registry.



Another option would be to have an assessment done through the Virginia Tech Autism Clinic (<7 years old) OR Child Assessment Clinic (>7 years old). In this assessment you would complete ASD measures and assessments and receive a diagnostic summary as well but you would not be participating in the VTCAR research database at this time. 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 who know your child, if applicable (for example, teachers or doctors) to try to get a bigger picture of him/her. Therefore, this assessment is more comprehensive, and is considered a full clinical evaluation.  With this assessment, fees start at $700, but may be lower based on a sliding scale.