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Our team brings together OCD research experts from clinical, genetic, imaging and neurocognitive areas of study.

Michael Jenike, M.D.

Michael Jenike, M.D. is the principal investigator on the OCD Longitudinal Family Study. He is a Professor of Psychiatry at Harvard Medical School and practices psychiatry at Massachusetts General Hospital and McLean Hospital. He is also the clinic director of psychopharmacology and somatic treatment program at McLean Hospital. He specializes in the treatment and study of Obsessive-Compulsive Disorder.

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Scott Rauch, M.D.

Dr. Rauch received his undergraduate degree with honors in Neuroscience from Amherst College and attended medical school at the University of Cincinnati. He completed his residency training in Psychiatry as well as a Radiology Research Fellowship at Massachusetts General Hospital (MGH). Dr. Rauch served for many years as Associate Chief of Psychiatry for Neuroscience Research at MGH, where he was the founding Director of the Psychiatric Neuroimaging Research Program and the MGH Division of Psychiatric Neuroscience Research and Neurotherapeutics. Currently, Dr. Rauch is President and Psychiatrist in Chief of McLean Hospital as well as Chair of Partners Psychiatry and Mental Health. He holds an appointment as Associate Professor of Psychiatry at Harvard Medical School. Dr. Rauch has contributed over 250 publications to the scientific literature and serves on the editorial boards of several journals. He has received numerous honors, including the 2004 Joel Elkes Award for outstanding contributions in translational research within psychiatry.

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Sabine Wilhelm, Ph.D.

Dr. Wilhelm is an Associate Professor of Psychology at Harvard Medical School. She is Director of the Obsessive-Compulsive and Related Disorders Clinic as well as Director of the Cognitive-Behavioral Therapy Program at Massachusetts General Hospital. Dr. Wilhelm is recognized as a leading researcher in Obsessive-Compulsive Disorder (OCD), Body Dysmorphic Disorder, and Tic Disorders, and she has published numerous articles and chapters on the cognitive functioning, prevalence, and treatment outcome of these disorders. Currently, Dr. Wilhelm is the principal investigator of several NIMH-funded clinical research studies. In addition, Dr. Wilhelm recently published a treatment manual for OCD Cognitive Therapy for Obsessive-Compulsive Disorder: A Guide for Professionals and a self-help book for Body Dysmorphic Disorder called Feeling Good About the Way You Look: A Program for Overcoming Body Image Problems. Dr. Wilhelm serves on several editorial and advisory boards and she is often invited to speak around the country and internationally.

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Ellen Braaten, Ph.D.


Dr. Ellen Braaten is the Director of the Learning and Emotional Assessment Program (LEAP) at Massachusetts General Hospital and the Track Director of the Child Psychology Training Program at MGH/Harvard Medical School. She is an Assistant Professor of Psychology at Harvard Medical School. Dr. Braaten is widely recognized as an expert in the field of pediatric neuropsychological and psychological assessment, particularly in the areas of assessing learning disabilities and attentional disorders. She has been the recipient of funding to conduct research studies on children with nonverbal learning disabilities and attentional disorders and has published numerous papers, chapters, and reviews on ADHD, learning disabilities, gender and psychopathology, intelligence, and neuropsychological and psychological assessment of children. She is the co-author of Straight Talk about Psychological Testing for Kids, a book that has become a classic for parents and professionals. She has also written The Child Clinician's Report Writing Handbook, and her next book for parents, entitled Finding the Right Mental Health Care for Your Child, will be published by the American Psychological Association in late 2009.



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Greg Chasson, Ph.D.


Dr. Chasson received his Ph.D. in Clinical Psychology from the University of Houston in 2008. During graduate school, he trained as a cognitive-behavioral therapist and conducted research on a variety of topics, including the nature and treatment of autism, as well as treatment for child victims of violence. He also received specialized clinical and research experience for two years at The Menninger Clinic's OCD Treatment Program, training as an extern and Research Coordinator. Dr. Chasson then completed his clinical internship at McLean Hospital, where he continues to collaborate on various research projects with the OCD Institute. As a Clinical and Research Fellow, he is now completing his post-doctoral training in the Department of Psychiatry at Massachusetts General Hospital, serving as both a Project Director for the Longitudinal Family OCD Study and cognitive-behavioral therapist for the OCD and Related Disorders Program. Dr. Chasson also maintains an academic appointment as a Clinical Fellow in Psychology in the Department of Psychiatry at Harvard Medical School.

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Anne Chosak, Ph.D.

Anne Chosak, Ph.D. is a Clinical Assistant of Psychology (Psychiatry) at MGH and an Instructor at Harvard Medical School. Dr. Chosak's clinical and research background is in anxiety disorders of adulthood. Dr. Chosak received her Ph.D. in clinical psychology from SUNY at Albany in 2000. She received her post-doctoral training at the OCD Clinic at MGH and was licensed in 2002. Dr. Chosak has taught undergraduate psychology courses at Brandeis University and has worked at the Lahey Clinic in Burlington MA and at the OCD Institute at McLean Hospital in Belmont MA. Dr. Chosak's current clinical and research interests involve the OCD spectrum disorders (OCD, habit control, tic, BDD) in children and adults. In addition, Dr. Chosak supervises interns for the MGH clinical psychology internship program.

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Jeanne Fama, Ph.D.

Jeanne M. Fama, Ph.D., is a Clinical Research Fellow in Psychology (Psychiatry) at Massachusetts General Hospital/Harvard Medical School. Dr. Fama completed her Ph.D. in Clinical Psychology at Harvard University and her clinical internship at Massachusetts General Hospital/Harvard Medical School in 2005. She began researching Obsessive-Compulsive Disorder (OCD) and related disorders at the Massachusetts General Hospital OCD Clinic in 1997. She has since served as project coordinator and study therapist for several studies on the etiology, maintenance, and treatment of OCD, Body Dysmorphic Disorder (BDD), Tourette Syndrome, and chronic tic disorders. Dr. Fama's primary research interests include neuropsychological, cognitive, and family variables influencing treatment outcome in OCD and OCD-spectrum disorders, including BDD and Tourette Syndrome.

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Dan Geller, M.D.

Dr Geller is Director of the Pediatric Obsessive Compulsive Disorder (OCD) program at the Massachusetts General Hospital within the Division Of Pediatric Psychopharmacology and Assistant Professor of Psychiatry at Harvard Medical School. Dr Geller is acknowledged as a world expert in pediatric OCD through his lecturing, teaching and published writing.

Dr Geller has been investigating the etiology, phenomenology, developmental expression across the lifespan, psychiatric comorbidity, family genetics, treatment response and long-term outcome of OCD that onsets in early life for over ten years and has produced a coherent and comprehensive body of original research. Publications include many original papers, reviews, new research presentations and symposia at national scientific meetings and numerous book chapters. Here at MGH he has collected and characterized the largest sample of children and adolescents with OCD ever assembled. The potential value of longitudinal study of such a sample for the field of child psychiatry is very great. He often collaborates with others around the country in these efforts and has won competitive grants from the NIMH, non-profit Foundations and industry to pursue such research. Dr Geller is also a member of the OCD Genetics Consortium, collaborating with senior scientists from 13 different countries around the world, whose stated goal is the identification of genes responsible for OCD and delineating mechanisms by which genetic vulnerabilities are translated into clinical symptoms.

Dr Geller is a recipient of several honors and awards in Community Medicine, Developmental Pediatrics, the American Academy of Child and Adolescent Psychiatry, the Obsessive-Compulsive Foundation, the Tourette's Syndrome Association, and a member of several expert panels including the American Academy of Child and Adolescent Psychiatry and the National Institute for Clinical Excellence, National Collaborating Center for Mental Health, Royal College of Psychiatrists, London.

Dr Geller completed his training as a general and developmental pediatrician in Australia and is a Fellow of the Royal Australian College of Physicians-Pediatrics. He came to the United States in 1987 to pursue further training in developmental pediatrics at Johns Hopkins University and is a member of the Society for Developmental Pediatrics. He subsequently trained as a general and child and adolescent psychiatrist at Johns Hopkins and Stanford medical schools and came to Harvard in 1992.

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Jennifer Ragan, Ph.D.

Jennifer Ragan received her Ph.D. in Clinical Psychology from the University of Texas at Austin in 2005. There, Dr. Ragan received extensive training in cognitive-behavioral therapy and provided supervision to junior clinicians through Dr. Michael Telch's Anxiety Research Lab at the University of Texas at Austin. She then completed her clinical internship and post-doctoral training through Massachusetts General Hospital-Harvard Medical School. Dr. Ragan is now a licensed psychologist and sees patients through the OCD clinic at Massachusetts General Hospital and in private practice. Her clinical interests are broad, in that she treats patients suffering from anxiety, mood, and eating disorders using both individual and group modalities. Her research interests center around the assessment and treatment of anxiety disorders, Obsessive Compulsive Disorder, and Body Dysmorphic Disorder through Dr. Sabine Wilhelm's research lab.

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S. Evelyn Stewart, M.D.

Dr. Stewart is a medical and genetic researcher and a child and adult psychiatrist. She is an Instructor of Psychiatry at Harvard Medical School and Director of Research at the OCD Institute, McLean Hospital. She is a member of the MGH Psychiatric and Neurodevelopmental Genetics Unit and Center for Human Genetic Research and is an attending physician at both the MGH Pediatric OCD/ Tourette Disorder Clinic and at the MGH OCD Clinic. Dr. Stewart completed medical school and psychiatry residency training in Canada, and completed a Harvard Medical School OCD research fellowship at McLean Hospital and MGH. She sits on the Scientific Advisory Board of the Obsessive-Compulsive Foundation (OCF) and is currently a recipient of a Harvard Medical School Scholar in Medicine award and an OCF research grant. Her clinical, teaching and research efforts, including her published papers and chapters, focus on the genetics and familial aspects of OCD, Tourette Disorder and related illnesses, and also on OCD throughout the lifespan.

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Jedidiah Siev, Ph.D.


Jedidiah Siev, Ph.D, is a Clinical Fellow in Psychology (Psychiatry) at the Massachusetts General Hospital/Harvard Medical School. As a graduate student at the University of Pennsylvania, he received specialized training in empirically-supported treatments for OCD and related disorders, as well as other anxiety and internalizing disorders. Broadly speaking, Jed is interested in the roles of cognitive and family factors in the development and maintenance of internalizing disorders, especially OCD and related disorders, as well as psychotherapy outcome research investigating the contributions of active ingredients and common factors. Within the domain of OCD specifically, Jed's research focuses on judgment and decision making processes relevant to symptoms, the roles of cognitive and meta-cognitive correlates of OCD, and issues relevant to the treatment of scrupulosity, an OCD presentation characterized by moral and/or religious fears.



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Kiara Timpano, Ph.D.


Kiara R. Timpano, Ph.D., is a Clinical Fellow in Psychology (Psychiatry) at the Massachusetts General Hospital/Harvard Medical School, and a doctoral candidate at Florida State University. Ms. Timpano's clinical and research background is in anxiety and related disorders, with an emphasis on OCD. Her primary research interests lie in understanding the etiology, comorbidity, and maintenance of hoarding and OCD. She has also focused her efforts on vulnerability factor research and the development of prevention measures. Currently, she is working on several projects including the investigation of genetic and environmental vulnerability factors associated with OCD and hoarding, as well as an exploration of the phenomenology of compulsive hoarding.



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Jared Kant, B.A.

Jared Kant graduated from Curry College in 2006 with a BA in English and Creative Writing. Through High School and college, he has worked with the Obsessive Compulsive Foundation in New Haven, CT. Currently, Jared is the author of a book on Obsessive-Compulsive Disorder (Oxford University Press, 2008). Jared works as a research coordinator at the Body Dysmorphic Disorder Clinic under the supervision of Dr. Sabine Wilhelm. Currently, Jared is a graduate student at the Simmons Graduate School of Social Work.

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Lauren Manning, B.A.

Lauren Manning is research assistant on the Longitudinal Family OCD Study working with the neuroimaging team on the MRI portion of the study. She received her BA from Yale University in 2005 and plans to continue on to graduate school in the field of psychology.

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Theresa Rowley, B.A.

Theresa Rowley graduated in 2008 from Boston University with a BA in psychology. At Boston University Theresa worked at the Center for Anxiety and Related Disorders. She assisted on research projects related to sleep disturbance and anxiety. Currently, Theresa is working on the Longitudinal Family OCD Study examining OCD in families. After working in the OCD Clinic, Theresa hopes to pursue a career in clinical psychology.

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Tracy Singer, B.A.

Tracy Singer graduated in 2008 from University of North Carolina- Chapel Hill with a Bachelor's in psychology. While at UNC, Tracy worked on research projects related to OCD and became interested in similar anxiety disorders. Currently, Tracy assists on a study for Obsessive Compulsive Disorder under the supervision of Dr. Sabine Wilhelm. After her time at MGH, she hopes to pursue a doctorate degree in clinical psychology.

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Ashley Shaw, B.A.

Ashley Shaw graduated in 2009 from the University of North Carolina ? Chapel Hill with a degree in Psychology. At UNC, Ashley worked in a Peer Relations Lab and researched how peers influence the development of eating disorders and substance abuse problems. Ashley also worked for the Autism Society of North Carolina as a Community Skills Instructor. At MGH, Ashley will work on the Longitudinal Family OCD Study. After working at MGH, Ashley plans to pursue a doctoral degree in Clinical Psychology.

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Kaitlyn Welsh, B.A.

Kaitlyn Welsh graduated from Boston University in 2008 with a B.A. in Psychology. While at Boston University, Kaitlyn worked as a research assistant at the Center for Anxiety and Related Disorders with Dr. Michael Otto on several stress related studies. Currently, Kaitlyn is working with Dr. Wilhelm on the Longitudinal Family OCD Study. After working at the OCD Clinic, Kaitlyn plans to pursue a doctorate in Clinical Psychology.

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Meet our Team


Principal Investigator

Michael Jenike, M.D.

Executive Co-Investigators

Scott Rauch, M.D.
Sabine Wilhelm, Ph.D.

Co-Investigators

Ellen Braaten, Ph.D
Greg Chasson, Ph.D.
Ann Chosak, Ph.D.
Jeanne Fama, Ph.D.
Dan Geller, M.D.
Jennifer Ragan, Ph.D.
S. Evelyn Stewart, M.D.
Jedidiah Siev, Ph.D.
Kiara Timpano, Ph.D.

Research Assistants

Jared Kant, B.A.
Lauren Manning, B.A.
Theresa Rowley, B.A.
Tracy Singer, B.A.
Ashley Shaw, B.A.
Kaitlyn Welsh, B.A.

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