Welcome to NAC!

Located in the Philadelphia area, the Neuropsychology Assessment Center (NAC) specializes in neuropsychological evaluations for the investigation of a variety of developmental and acquired conditions. These include learning disabilities, ADHD, autism spectrum disorder and language/social communication disorders, concussion/traumatic brain injury, and epilepsy. NAC also provides personality assessments and intellectual ability evaluations. NAC is a 501(c)(3) organization, with a three-fold mission:


NAC provides comprehensive assessment services at an affordable rate to individuals ranging in age from 5 years through adulthood. These services include:

• Neuropsychological evaluation
• Psychoeducational evaluation
• Adult and geriatric assessments
• Personality assessment
• Record review and recommendations


As a division of the Institute for Graduate Clinical Psychology, NAC serves as a training “arm” of the program. The assessments are performed by doctoral students under the direct supervision of licensed psychologists.

NAC encourages and supports students and faculty in the pursuit of research that focuses on a variety of neuropsychological conditions.


NAC’s staff includes three licensed psychologists with extensive training and experience in neuropsychology.

Mary F. Lazar, Psy.D.

Mary F. Lazar, Psy.D.

Director of NAC

Dr. Lazar is a pediatric neuropsychologist and certified school psychologist who specializes in the assessment of children with learning disabilities, ADHD, and a range of neurological disorders, including traumatic brain injury, brain tumor, and epilepsy.

Meghan DeVries, Psy.D.

Meghan DeVries, Psy.D.

Assistant Director of NAC

A graduate of Widener's doctoral program, she completed her postdoctoral fellowship in neuropsychology at Hershey Medical Center.

Kenneth Goldberg, Psy.D.

Kenneth Goldberg, Psy.D.

Consulting neuropsychologist

Associate Professor of Psychology within Widener's Institute for Graduate Clinical Psychology, as well as the Director of the Institute's Neuropsychology Track.

Frequently Asked Questions

What kind of services do you offer at the Neuropsychology Assessment Center (NAC)?

At NAC, we offer comprehensive neuropsychological assessments of clients in order to understand their unique strengths and challenges in a more holistic way. Our typical assessment includes an evaluation of:

Cognitive ability or ‘IQ’
Language skills
Learning and memory
Visual-spatial/visual perceptual skills
Attention and concentration
Executive functioning
Organization and planning,
Reasoning and problem solving skills
Fine motor sklls and sensory perception
Academic achievement
Behavioral/emotional/personality functioning

Does NAC offer therapy services?

Depending on the referral question, therapy services may be offered by one or more of the doctoral interns at NAC.

What hours are you open for business?

We are open three days a week. In the summer months (July & August) we are open on Mondays, Tuesdays, and Wednesdays. For the remainder of the year we are open for business on Mondays, Wednesdays, and Fridays from 9 to 5.

How long does testing usually take?

Testing time can vary. Evaluations of adults typically require a full day. Adolescents may also be able to complete the evaluation in a day. Children are typically scheduled over a two-day period; the length of the testing day will vary by age, with younger children working for a half day, and older children working for as long as a school day. Children are usually assessed on a Monday and Wednesday. If more time is needed for either the adult or child being evaluated, then an additional day of testing is scheduled at a time that is mutually convenient.

When do I get my results from testing?

About 4-6 weeks after the evaluation, a feedback session is held to discuss the results and provide recommendations.

Do I get a copy of my test results?

You will receive a copy of the report either at the time of the feedback, or within about a week of that meeting if additional changes to the report are needed.

Is there a fee associated with testing?

Yes, there is a fee for the evaluation, which varies depending on the type of services being provided. NAC offers a sliding scale fee structure that is largely based on your household income, though other factors are also considered. Payments are accepted by check or credit card (Visa or MasterCard).

NAC also offers evaluation options twice a year in February and March for those individuals who still find the sliding scale fee to be too high. These evaluations are offered at a significantly reduced rate as part of a doctoral class and are performed under the supervision of a licensed psychologist.

Does NAC accept insurance?

No, NAC is no longer accepting insurance. However, at the conclusion of the evaluation, we can prepare an invoice that you can submit to your insurance company. Please make sure to ask the graduate assistant for this invoice, which will include the procedure and diagnostic codes that health insurance companies require.

What kind of information will you ask for the initial intake?

During a scheduled phone intake, we generally ask clients to provide information about:

The age of the person being evaluated and reason for requesting services. Information about previous evaluations, diagnosis, and treatment may also be discussed. Should you wish to proceed with scheduling, appointment dates and the will be determined.

Is NAC an independent service provider?

No. NAC is affiliated with Widener University. Licensed doctoral psychologists are on staff and supervise students who attend Widener University’s Doctor of Psychology program at the Institute for Graduate Clinical Psychology.

Do I have to get a full evaluation if I am being tested at NAC?

No. Individual IQ tests can be done upon request.

Can I request a specific psychologist to perform my evaluation?

At NAC, we operate with a team approach. When you are referred to us, you are assigned a team consisting of the supervising psychologist, intern, and practicum student who all work together on your case. A

Contact Us

To make an appointment or for other questions, please call us during business hours on Monday, Wednesday, or Friday.

If you need to mail anything to us, our mailing address is below:

Neuropsychology Assessment Center
Widener University
One University Place
Chester, PA 19013