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Our Team

The staff at the Anxiety Disorders Center/Center for Cognitive Behavioral Therapy are world-renowned experts in the diagnosis and treatment of anxiety and mood disorders.

Dr. David Tolin Elizabeth Davis, Ph.D. Gretchen J. Diefenbach, Ph.D. Christina Gilliam, Ph.D.

Scott Hannan, Ph.D. Suzanne Meunier, Ph.D. Kristen Springer, Ph.D.Blaise Worden, Ph.D.


Dr. David Tolin

David Tolin, Ph.D., ABPP

Director, Anxiety Disorders Center
Director, Division of Neuropsychology
Director, Division of Health Psychology
Director, Center for Cognitive Behavioral Therapy
Phone: 860.545.7685
Fax: 860.545.7156
Website: www.drtolin.com

Dr. David Tolin is the founder and Director of the Anxiety Disorders Center, Director of the Division of Neuropsychology, Director of Health Psychology, and Director for Cognitive Behavioral Therapy at the The Institute of Living. He is also Adjunct Associate Professor of Psychiatry at Yale University School of Medicine. Dr. Tolin received his Ph.D. from the University of Arkansas, and completed a predoctoral internship at Tufts University School of Medicine/VA Medical Center, Boston.

Dr. Tolin’s research and clinical interests include:

  • Cognitive-behavioral therapy for anxiety disorders in adults and children, particularly obsessive-compulsive disorder, posttraumatic stress disorder, and panic disorder.
  • The nature and treatment of hoarding disorder.
  • The nature and treatment of body-focused repetitive behavior disorders such as trichotillomania.
  • The interaction between psychotherapy and pharmacotherapy in the treatment of anxiety disorders.
  • Cognitive processes that underlie anxiety disorders, particularly dysfunctional beliefs and mechanisms of information processing.

Dr. Tolin is President-Elect of the Clinical Psychology Division of the American Psychological Association. He is board certified in clinical psychology by the American Board of Professional Psychology, and is a Fellow of the American Academy of Clinical Psychology. He is the recipient of the award for Distinguished Contribution to the Science of Psychology and Distinguished Contribution to the Practice of Psychology from the Connecticut Psychological Association, and an Early Career Award from the Anxiety Disorders Special Interest Group of the Association for Advancement of Behavior Therapy. Since 2003 he has served as a scientific reviewer for the National Institutes of Health.

Dr. Tolin is the author of over 100 journal articles and book chapters, and over 180 research presentations to national and international organizations. He is the author of the book Face Your Fears: A Proven Plan to Beat Anxiety, Panic, Phobias, and Obsessions, and co-author of the books Buried in Treasures: Help for Compulsive Acquiring, Saving, and Hoarding (with Drs. R. Frost and G. Steketee) and Treating Trichotillomania: Cognitive Behavior Therapy for Hair Pulling and Related Problems (with Dr. M. Franklin). Dr. Tolin also authored a DVD training program for professionals entitled Buried in Treasures: A Professional's Guide to Hoarding Disorder.

Dr. Tolin has been principal investigator on the National Institute of Mental Health (NIMH)-funded studies “Neural Mechanisms of Compulsive Hoarding,” “Exposure, D-Cycloserine Enhancement, and Genetic Modulators in Panic Disorder,” and “Stepped Care for Obsessive-Compulsive Disorder” and co-investigator on the NIMH-funded studies “Psychopathology of Compulsive Hoarding” (principal investigator: R. Frost), “Treatment of Compulsive Hoarding” (principal investigator: G. Steketee), and “Screening for GAD among Frail Elderly” (principal investigator: G. Diefenbach). He has served as principal investigator on several industry-sponsored clinical trials of experimental medications. Dr. Tolin currently hosts the Oxygen television series My Shopping Addiction. Previously, he was the host of the VH1 television series The OCD Project, and was the first psychologist featured on the A&E series Hoarders. In addition, he has been a recurrent guest on programs such as The Dr. Oz Show, Anderson Cooper Live, and The Oprah Winfrey Show (1, 2, 3).

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Elizabeth Davis, Ph.D.Elizabeth Davis, Ph.D.

Staff Psychologist,
Anxiety Disorders Center
Phone: 860.545.7918
Email: Elizabeth.Davis@hhchealth.org

Dr. Davis is continually impressed by the human capacity for resilience and the courage that individuals demonstrate as they face life’s challenges. Using evidence-based approaches, Dr. Davis collaborates with clients to empower them to make meaningful changes and alleviate their suffering.

Dr. Davis attended the Clinical Psychology doctoral program at Suffolk University in Boston, Massachusetts.Prior to joining the Anxiety Disorders Center, Dr. Davis completed her predoctoral internship at University of Rochester Medical Center where she specialized in working with children, adolescents and families.

Dr. Davis joined the Anxiety Disorders Center in 2012 as a post-doctoral fellow and is now a full-time staff psychologist. Dr. Davis works with children, adolescents and adults. Dr. Davis also has particular expertise in incorporating elements of mindfulness and acceptance-based treatments (such as Acceptance and Commitment Therapy and Mindfulness-Based Stress Reduction) into Cognitive-Behavioral Therapy.

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Gretchen J. Diefenbach, Ph.D.Gretchen J. Diefenbach, Ph.D.

Senior Scientist, Anxiety Disorders Center
Adjunct Assistant Professor, Yale University School of Medicine
Phone: 860.545.7685
Fax: 860.545.7156
Email: Gretchen.Diefenbach@hhchealth.org

Dr. Gretchen Diefenbach completed her graduate training in clinical psychology at Louisiana State University. She completed her postdoctoral fellowship specializing in the treatment of late-life anxiety at the University of Texas-Houston Health Science Center.

Dr. Diefenbach's primary clinical and research interests are in the psychopathology and cognitive-behavioral treatment of anxiety and related disorders. She has particular expertise with generalized anxiety disorder, obsessive-compulsive disorder, and trichotillomania.

Dr. Diefenbach is the principal investigator on the Hartford Hospital funded studies entitled “The Transcranial Magnetic Stimulation Research Program” and “Effectiveness and Neuropsychological Predictors of Guided Self-Help for OCD”.

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Christina Gilliam, Ph.D.Christina Gilliam, Ph.D.

Staff Psychologist, Anxiety Disorders Center
Phone: 860.545.7685
Fax: 860.545.7156
Email: Christina.Gilliam@hhchealth.org

Dr. Christina Gilliam received her Ph.D. from the University of Missouri-St. Louis and completed her predoctoral internship at the Greater Hartford Consortium, a collaboration between the VA Connecticut Healthcare System, UCONN Health Center, Community Mental Health Affiliates, and New Britain General Hospital. She completed her postdoctoral fellowship at the Anxiety Disorders Center in 2008, and remained on staff as a licensed psychologist.

Her research interests include the role of cognitive processes in the development, maintenance, and treatment of anxiety disorders and examining the efficacy of novel cognitive-behavioral treatments for anxiety disorders.

Dr. Gilliam specializes in the treatment of anxiety and related disorders. Her clinical interests include obsessive compulsive disorder, specific phobia, panic disorder, agoraphobia, and social phobia.

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Scott Hannan, Ph.D.Scott Hannan, Ph.D.

Staff Psychologist, Clinic Program Manager,
Anxiety Disorders Center, Center for Cognitive Behavioral Therapy
Phone: 860.545.7685
Fax: 860.545.7156
Email: Scott.Hannan@hhchealth.org

Dr. Scott Hannan is a psychologist and program manager for the outpatient clinic at the Anxiety Disorders Center and Center for Cognitive Behavioral Therapy. He received his Ph.D. from Fordham University and completed his predoctoral internship at The Institute of Living with a focus on child and adolescent psychology. He completed his postdoctoral fellowship at the Anxiety Disorders Center of The Institute of Living working with children, adolescents, and adults.

His clinical interests include obsessive-compulsive disorder, phobias, panic disorder, posttraumatic stress disorder related to motor vehicle accidents, and the treatment of children and adolescents with anxiety disorders. Given his expertise in these areas, Dr. Hannan has been a featured expert on the A&E television show Hoarders.

In addition to seeing patients in individual treatment, Dr. Hannan runs groups for children and adolescents. Groups are for children and adolescents diagnosed with Panic Disorder, Social Phobia, Separation Anxiety Disorder, Specific Phobia and/or Generalized Anxiety Disorder. He has also started a short term group for adults with Major Depressive Disorder and Generalized Anxiety Disorder.

Dr. Hannan is also interested in the use of psychological measurements to assess treatment progress. He is currently working on adding computer administered measures to clinical treatment as a way to monitor treatment progress and aid treatment decisions.

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Suzanne Meunier, Ph.D.Suzanne Meunier, Ph.D.

Staff Psychologist, Anxiety Disorders Center
Phone: 860.545.7685
Email: Suzanne.Meunier@hhchealth.org

Dr. Meunier earned her Ph.D. in clinical psychology at the University of Arkansas. She completed her postdoctoral fellowship at the Anxiety Disorders Center and remained as staff. She then worked as a staff psychologist and clinical instructor at the OCD and Related Disorders Clinic at Massachusetts General Hospital/Harvard Medical School. She returned to Arkansas and opened a private practice focused on the treatment of anxiety and OCD related disorders.

Dr. Meunier returned to the Anxiety Disorders Center as a staff psychologist in 2014. She is grateful to have the opportunity to assist her clients in learning skills to help alleviate their symptoms and create meaningful change in their lives. She firmly believes in the human capacity to create change and strives to identify the barriers that impede growth.

Dr. Meunier specializes in cognitive behavior therapy for anxiety, obsessive compulsive spectrum, and eating disorders. She is committed to the use of empirically supported interventions to optimize treatment outcomes.

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Kristen Springer, Ph.D.

Kristen Springer, Ph.D.

Staff Psychologist, Anxiety Disorders Center
Phone: 860.545.7685
Fax: 860.545.7156
Email: Kristen.Springer@hhchealth.org

Dr. Springer received her Ph.D. in Clinical Psychology from the University of Florida in Gainesville, FL in 2015 with a specialty in cognitive behavioral treatments for chronic pain and anxiety disorders. She then completed her pre-doctoral internship at Eastern Virginia Medical School in Norfolk, VA. Dr. Springer subsequently completed a clinical post-doctoral fellowship at the Anxiety Disorders Center/Center for Cognitive Behavioral Therapy and remains on staff as a licensed psychologist.

Her clinical interests include cognitive behavioral therapy with adolescents and adults for panic disorder, obsessive-compulsive disorder, social anxiety disorder, phobias, depression, chronic pain, and hoarding disorder. Current research interests include treatment and assessment of respiratory variables in panic disorder. Dr. Springer has authored several scientific journal articles in the fields of both anxiety and chronic pain.

She is committed to helping patients reach their goals as she works collaboratively with them in a structured yet empathic manner using the most up-to-date empirically validated treatments.

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Blaise Worden, Ph.D.

Blaise Worden, Ph.D.

Staff Psychologist, Anxiety Disorders Center
Phone: 860.545.7685
Fax: 860.545.7156
Email: Blaise.Worden@hhchealth.org

Dr. Worden received her Ph.D. in clinical psychology from Rutgers University. In 2009 she completed her predoctoral internship at the Greater Hartford Internship Consortium in Hartford, CT. In 2012 she completed a two-year postdoctoral fellowship at the Anxiety Disorders Center and has remained on staff as a licensed psychologist.

Her clinical and research interests include treatment outcome assessment and mechanisms of change underlying empirically-supported psychological treatments. Dr. Worden is currently the primary investigator on two Harford Hospital-funded studies, including “Development of an Anxiety Sensitivity-Based Intervention for Substance Use and Anxiety Comorbidity” and “A Pilot Study of Assertive Case Management for Hoarding Disorder.”

Dr. Worden specializes in the treatment of anxiety and related disorders. She has particular experience with cognitive-behavioral treatment of obsessive-compulsive disorder, hoarding disorder, and substance dependence.

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Anxiety Disorders Center