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Dr. William Sanderson and Dr. Janet Klosko have Co-Directed the Cognitive Therapy Center of Long Island since its inception in 1989. They are both New York State licensed clinical psychologists and Founding Fellows of the Academy of Cognitive Therapy.

The staff of CTCLI practices cognitive-behavioral therapy, a short-term form of therapy that has been scientifically demonstrated to significantly help many psychological disorders, such as depression, anxiety, excessive anger, sexual problems, eating problems, physical stress symptoms, insomnia, impulse-control problems, social skills problems, and relationship problems.

The staff also practices schema therapy, a longer-term psychotherapy that focuses on healing lifelong self-defeating patterns, such as one finds in personality disorders. Schema therapy addresses eighteen schemas, including Mistrust/Abuse, Abandonment, Emotional Deprivation, Defectiveness, Social Isolation, Failure, Dependence, Undeveloped Self, Vulnerability to Harm, Subjugation, Self-Sacrifice, Approval-Seeking, Pessimism, Emotional Inhibition, Unrelenting Standards, Punitiveness, Entitlement, and Insufficient Self-Discipline.


In addition to Co-Directing the Cognitive Therapy Center of Long Island, Dr. Klosko is the Senior Psychologist at the Cognitive Therapy Center of New York in Manhattan. 

Dr. Klosko received her Ph.D. in clinical psychology from the State University of New York at Albany, and interned at the Brown University School of Medicine. While at Albany, she worked with David H. Barlow, Ph.D., researching and treating anxiety disorders with cognitive-behavioral therapy. She won the Albany Award for Excellence in Research, and the Dissertation Award from the American Psychological Association Section on Clinical Psychology as a Science. She is a Founding Fellow of the Academy of Cognitive Therapy.

Dr. Klosko has published a number of professional and self-help books: Reinventing Your Life (Young & Klosko, 1994);Cognitive-Behavioral Treatment of Depression (Klosko & Sanderson, 1999); and Schema Therapy: A Practioner’s Guide(Young, Klosko, & Weishaar, 2003). She has also published many scientific articles on the assessment and treatment of anxiety.

Dr. Klosko has a M.A. in English Literature from McGill University, and a B.A. in Comparative Literature from Union College.

Visit Dr. Klosko's webpage:  https://sites.google.com/site/janetkloskocom/

Dr. William C. Sanderson is Professor of Psychology at Hofstra University (Long Island, NY) where he teaches in the undergraduate and graduate (PhD) programs in psychology and Directs the Anxiety and Depression Clinic.  His primary areas of research include anxiety disorders, depression, and cognitive behavior therapy.  Dr. Sanderson’s clinical expertise is in cognitive behavior therapy for patients with anxiety and depressive disorders, and he has been treating and conducting research on such patients since 1983.

Dr. Sanderson received his Ph.D. from the University of Albany, where he worked under the mentorship of Dr. David Barlow at the Center for Stress and Anxiety Disorders. He then completed a Fellowship in Cognitive Therapy with Dr. Aaron T. Beck (the founder of cognitive therapy) at the Center for Cognitive Therapy, University of Pennsylvania.  Dr. Sanderson is a Founding Fellow of the Academy of Cognitive Therapy.

Dr. Sanderson has participated on numerous national committees, including the American Psychiatric Association's DSM-IV Anxiety Disorders Workgroup, and was recently the Chair of the American Psychological Association Division of Clinical Psychology's Committee on Science and Practice (a Task Force aimed at identifying and promoting the practice of empirically supported psychological interventions). He has published seven books and over 100 articles and chapters, primarily in the areas of anxiety, depression, personality disorders, and cognitive behavior therapy.

View Dr. Sanderson's website at DrSanderson.com

Laura Silberstein, Psy.D. is a New York state licensed psychologist who specializes in cognitive behavioral therapy for adults and adolescents. In addition to practicing at the CTILI in Great Neck and with Rennicke and Associates in Manhattan, Dr. Silberstein is an interventionist on a research study at Memorial Sloan Kettering Hospital and the Cancer Institute of New Jersey, providing therapy to women with Gynecological Cancers. Dr. Silberstein has extensive training, including both clinical and research experience working with; anxiety disorders, impulse control disorders, mood disorders, mindfulness and acceptance, chronic pain, insomnia, emotion regulation, and Buddhist psychology.

Dr. Silberstein received her doctorate in Clinical Psychology from the Ferkauf Graduate School of Psychology at the Albert Einstein School of Medicine, Yeshiva University in New York. For two years, she served as an extern clinician at the American Institute for Cognitive Therapy, under the direction of Dr. Robert Leahy in Manhattan. Dr. Silberstein’s pre-doctoral internship involved delivering CBT and DBT services in both inpatient and outpatient settings at Wyoming State Hospital. Dr. Silberstein completed a two year Postdoctoral Fellowship in Cognitive Behavioral Therapy at the Cognitive Behavioral Institute of Albuquerque.

Dr. Silberstein maintains an active course of clinical training and practice, which includes her regular participation in workshops and consultation. She has received advanced training and supervision in the areas of Cognitive Behavioral Therapy, Acceptance and Commitment Therapy, Compassion Focused Therapy, Dialectical Behavior Therapy, Mindfulness Meditation, and Emotion Focused Therapy; having worked with a range of trainers including Steven Hayes, Kelly Wilson, Paul Gilbert, and Marsha Linehan.

Dr. Silberstein's research into the relationships between mindfulness, psychological flexibility and emotional schemas has been presented at national and international scientific conferences. This research has taken part in collaboration with Dr. Robert Leahy and Dr. Dennis Tirch, and it is a part of the ongoing research program at The American Institute for Cognitive Therapy, which examines the fundamentals of Emotional Schema Theory.