About Us

Dr. Sarfaty | Dr. Karassik | Dr. Steinberg |
Dr. Johnston | Dr. Gitman
| Dr. Garfinkle

Stephen D. Sarfaty, Psy.D., Director

Dr. SarfatyDr. Stephen D. Sarfaty received his Bachelor's in Psychology from Livingston-Rutgers in 1977 and his Doctor of Psychology from the Illinois School of Professional Psychology in 1981. He is a Diplomate with The American Board of Professional Neuropsychology, The American Board of Clinical Neuropsychology and The American Board of Professional Disability Consultants. A well-known Connecticut neuropsychologist, he was appointed to the Governor's Task Force on Traumatic Brain Injury, and was a member of the charter Board of Directors of the Brain Injury Association of Connecticut and leader for ten years of the Association's Gaylord Hospital weekly traumatic brain injury satellite support group.

He is Director of Comprehensive Neuropsychological Services, P.C., (CNS), in Cheshire, Connecticut, and a consulting neuropsychologist to a number of area hospitals and programs. He was Assistant Clinical Professor at the University of Hartford, taught at Quinnipiac College and lectured at Yale University. He presents to many professional and public groups across Connecticut, around the country and internationally. He has contributed to the development of validity determination protocols for forensic neuropsychological examinations. He was a recipient of the Brain Injury Association's 1988 and 1991 awards for Meritorious Service.

Dr. Sarfaty and his staff are committed to the provision of quality, client-centered services. They are also committed to advocacy for the improvement of both quality health care delivery and valued social roles for variously abled persons.

Dr. Sarfaty also serves as a consulting and testifying expert witness in cases of traumatic brain injury.



Dr. KarassikBeth M. Karassik, Ph.D.

Dr. Beth M. Karassik is a licensed psychologist with broad-based experience spanning 20 years in clinical and forensic psychology and neuropsychology.  Her training affords her a deep understanding of what drives, motivates and sustains human behavior.  Dr. Karassik is a well-known and respected pediatric neuropsychologist with Comprehensive Neuropsychological Services, P.C. and has provided breakthrough performance coaching with Performance First, Inc. 

Dr. Karassik received her Ph.D. in Clinical Psychology from Emory University in 1989.  She completed her post-doctoral neuropsychology training in California at St. Jude Hospital and Rehabilitation Center and at NeuroCare.  She has been trained as a Divorce Coach and Child Specialist in the Collaborative Practice of Divorce.  Dr. Karassik consults with physicians, attorneys, and educators regarding differential diagnosis, educational planning and treatment recommendations for children and adults with a broad range of neuropsychological, learning, emotional, and behavioral disorders. She provides expert testimony in depositions and in court. Dr. Karassik also provides outpatient psychological and neuropsychological services to both children and adults.   In her Collaborative Divorce practice, she works with divorcing families as a Divorce Coach and Child Specialist, bringing a deep appreciation of the impact of divorce on families and couples. Dr. Karassik, in association with Lisa J. Cappalli, Esq., Louise R.Zito, Esq., and Karly Mitchell, MBA, CDFA, offers The Close, a new model for containing the cost, conflict and duration of the divorce process.

Dr. Karassik is a Diplomate with the American Board of Professional Disability Consultants.  She is a member of the American Psychological Association, the Connecticut Psychological Association, the Connecticut Neuropsychological Society (past-secretary), the Brain Injury Association of Connecticut, the Connecticut Council for Non-Adversarial Divorce (Board Member), and the International Academy of Collaborative Professionals.  Dr. Karassik is affiliated with the Collaborative Divorce Team of Connecticut and Divorce Solutions of Connecticut as both a Divorce Coach and Child Specialist.

Dr. Karassik is committed to supporting children, adults and families in creating new possibilities for the future and transforming their lives in ways that align with the fulfillment of their dreams and serve their best interests.

Dr. Karassik joined Comprehensive Neuropsychological Services in 1992.



Brett A. Steinberg, Ph.D.

Dr. SteinbergDr. Brett A. Steinberg is a neuropsychologist who specializes in neurological and psychiatric disorders of adulthood, old age, and adolescence. After earning his B.S. in psychology from the
University of Massachusetts in Amherst, Massachusetts, and his Ph.D. in clinical psychology from the University of South Carolina in Columbia, South Carolina, he completed his pre-doctoral internship at the Gainesville Department of Veterans Affairs Medical Center and the University of Florida Health Sciences Center in Gainesville, Florida, and his postdoctoral fellowship in clinical neuropsychology at the University of Michigan Medical Center in Ann Arbor, Michigan.

In addition to providing diagnostic and psychotherapeutic services to individuals, couples, and families in a variety of outpatient and inpatient settings, Dr. Steinberg has served as a consultant to the New Haven Superior Court for Juvenile Matters and to the Learning Disabilities Association of Connecticut. As an investigator, he has conducted behavioral and functional neuroimaging research on age-related changes in brain structure and mental abilities, has studied the influence of concussion on
cognitive processes and the effects of practice and premorbid cognitive ability on neuropsychological test scores, and has explored factors that affect jurors’ decision-making and retention of information presented at trial.

Dr. Steinberg has served as Assistant Professor of Neuropsychology and Clinical Psychology in the Department of Psychology at the University of Connecticut in Storrs, Connecticut, and as Adjunct Assistant Professor of Psychiatry in the Department of Psychiatry at the University of Connecticut School of Medicine in Farmington, Connecticut. He has taught graduate courses in neuropsychological assessment, research design, and the neurobiology of aging. In addition, he has taught introductory psychology at the undergraduate level and has trained psychiatry residents and clinical psychology interns. His administrative and professional activities have included serving as a member of the University of Connecticut’s Institutional Review Board, as secretary of the Association of Doctoral Education in Clinical Neuropsychology, and as a member of the International Neuropsychological Society’s Scientific Program Committee.

Dr. Steinberg joined Comprehensive Neuropsychological Services, P.C., in 2003.



J. Dennis Johnston, Ph.D.Dr. Johnston

Dr. Dennis Johnston completed his doctoral training in Clinical Psychology at the University of Connecticut in Storrs. He then held a two-year Post-Doctoral Fellowship in Neuropsychology at the Institute of Living in Hartford. Since 1989, he has been providing psychological and neuropsychological services with Comprehensive Neuropsychological Services. Since 1992, he has also been on the staff at Hospital for Special Care in New Britain, Connecticut, where he is now the Assistant Chief of Psychology.

Dr. Johnston provides diagnostic and treatment services to individuals, couples, families and groups. He specializes in the assessment and treatment of individuals with brain-related problems, such as acquired brain injury, dementia, stroke, learning disabilities, attention deficit disorder, etc. He provides rehabilitative psychotherapy for individuals and families who are coping with the consequences of various neurological conditions, especially acquired brain injury, and has extensive experience helping people with adjustment disorders or anxiety conditions.

He has published articles or presented talks in his areas of expertise, and maintains a number of professional memberships. He is past-president of the Connecticut Neuropsychological Society. He enjoys leading a Brain Injury Association Support Group. In addition to his professional activities, he enjoys bicycling, singing, playing guitar, and traveling.


Karina Gitman, Ph.D.

Dr. GitmanDr. Karina Gitman brings a unique background to CNS as a graduate of a doctoral program in Counseling and School Psychology. She received extensive training in working with children and adolescents with developmental disabilities (autism spectrum disorders, mental retardation, and learning disabilities) and behavioral and psychiatric problems (ADHD, oppositional-defiant disorder, depression, anxiety, and psychotic disorders). She also worked in and consulted with schools regarding educational planning and placement, participated in behavioral modification programs, and developed individualized behavioral and education plans.

Dr. Gitman completed her doctoral studies at the State University at Buffalo, NY. Her research focus was on autism spectrum disorders and pediatric health psychology. She received post-doctoral training in neuropsychology at Jacobs Neurological Institute, serving primarily adolescent and adult populations. There, she gained experience in the neuropsychological evaluation of adolescents and adults with a variety of neurological and psychiatric disorders, including traumatic brain injury, stroke, demyelinating disorders, dementias, seizure disorders, brain tumors, substance abuse, learning disorders, schizophrenia, mood and anxiety disorders, and personality disorders. She also conducted capacity assessments, pre-neurosurgical baseline evaluations (e.g. for deep brain stimulation), and forensic examinations to determine claim validity. In addition, she worked with professional athletic teams in sport-related TBI evaluations. She also was involved in investigative research with local and national multiple sclerosis databases.

As a therapist, Dr. Gitman has worked with children and adolescents with oppositional defiant disorder, ADHD, autism spectrum disorders, Asperger’s disorder, mental retardation, conduct disorder, borderline personality disorder, self-mutilating behavior, depression, and anxiety. She also developed and implemented behavioral and cognitive-behavioral treatment plans and counseled families and children. Finally, she has provided psychotherapeutic services to adults with depression and anxiety disorders as well as stress- and relationship-related issues.

Dr. Gitman is licensed in Connecticut and New York. She joined Comprehensive Neuropsychological Services, P.C., in August, 2011.


Joanna Garfinkle, Ph.D.

Dr. Joanna Garfinkle provides psychotherapy for individuals and families coping with a wide range of issues, including autism, ADHD, anxiety, depression, eating disorders, and parenting and relationship concerns.  Her work incorporates behavioral, play, family systems, interpersonal, cognitive-behavioral, and mindfulness techniques.

Prior to joining CNS, Dr. Garfinkle provided individual, group, and family psychotherapy at diverse outpatient and residential settings, including the Yale Psychological Services Clinic, the Yale Center for Eating and Weight Disorders, the Clifford W. Beers Clinic, and the Devereux Foundation Beneto Residential Treatment Center.  She has extensive experience consulting to school systems and working with parents of special-needs children.

Dr. Garfinkle has published and presented in the area of attachment research.  Her academic background includes an undergraduate degree in psychology from Amherst College and a doctorate in developmental and clinical psychology from Yale University.  Dr. Garfinkle is licensed in Connecticut and Florida.  She joined Comprehensive Neuropsychological Services, P.C., in 2013.