Valerie L. Gaus, PhD, has been a practicing cognitive-behavioral therapist serving adults and adolescents with dual diagnosis (intellectual disability with comorbid psychiatric disorder), autism spectrum disorders, mood disorders, and anxiety disorders since she received her doctorate in clinical psychology from Stony Brook University in 1992. Since then she has maintained a private practice on Long Island, New York, and serves as the staff psychologist for the Vincent Smith School in Port Washington, New York. Dr. Gaus is on the advisory board of the Asperger Syndrome and High Functioning Autism Association, the grant review committee of the Organization for Autism Research, and the adjunct faculty at Long Island University/C. W. Post. She was also a founding board member of the New York Metro chapter of the National Association for the Dually Diagnosed. Dr. Gaus has written numerous articles and book chapters on mental health issues in developmental disabilities and has lectured extensively on these topics across the United States and abroad.