Dr. Sonia Greaven & Associates

Dr. Sonia Greaven – Clinical Psychologist (PSY20962)

Dr. Sonia Greaven is a Clinical Psychologist, licensed in California (PSY20962)  specializing in Cognitive Behavioral Therapy (CBT) using exposures (ERP).

Dr. Greaven provides services in Calabasas, California and virtually throughout the State of California.

She specializes in providing cognitive behavioral therapy to individuals suffering from anxiety disorders, as well as stress related to work and life transitions.

Dr. Greaven is a standing member of the American Psychological Association and the International OCD Foundation and recognized by Psychology Today.

She has worked in California for over 15 years.

Dr. Greaven received her Ph.D. in Clinical Psychology from Dalhousie University, Halifax, Canada and her B.A. in Honors Psychology at McGill University, Montreal, Canada

Dr. Greaven has conducted research and co-authored several studies in the areas of mood disorders, the psychology of gastrointestinal disorders, and life transitions.

She was a consultant to the NFL in Dallas for the Joyful Heart Foundation and its mission to transform society’s response to sexual assault, domestic violence, and child abuse, support survivors’ healing, and end this violence forever.

Dr. Greaven is fluent in English, French, and Spanish.

To accommodate busy schedules and to provide the best results, Dr. Greaven offers in-office and off-site treatment options, as well as phone and virtual video appointments.

Kim Oliva, Psy.D.  – Clinical Psychologist (PSY17364)

Dr. Kim Oliva is a Clinical Psychologist licensed in California since 2001.  She received her Psy.D. degree in Clinical Psychology at the California School of Professional Psychology, Los Angeles, and her B.A. in Psychology at UCLA.
Specializing in the treatment of Anxiety Disorders including Panic Disorder and Obsessive Compulsive Disorder (OCD), she utilizes Cognitive Behavioral Therapy (CBT), with a concentration on Exposure with Response Prevention (ERP) to address symptoms.  Treatment is focused and highly individualized, with the goal of improving daily functioning as quickly as possible.
Dr. Oliva has experience working with individuals, families, and groups, focusing on severe anxiety, depression, and trauma/abuse.  She is warm and direct, providing a collaborative and supportive environment to engage in this life changing, albeit challenging, process.  Working together in treatment, old patterns can be questioned, creating the path to a more fulfilling life.  She is fluent in English and Spanish.

Elizabeth Hamilton LSCW – Licensed Clinical Social Worker

(LCS25145)

Elizabeth is a Licensed Clinical Social Worker. She attended the University of Michigan – Ann Arbor and earned dual Masters degrees in Social Work (MSW) and Public Health (MPH).

She has been licensed in California since 2008 and provides cognitive behavioral therapy as well as other evidenced based practices.

She works with a wide range of patients, young children, teens, adults, and couples, with a focus on treatment for anxiety and depression. She is trained in Exposure and Response Prevention (ERP) for the treatment of anxiety, panic disorder and OCD. Her therapy style is collaborative, warm, direct and based upon an interest in and understanding of the role neurobiology plays in mental health conditions.

Her goal is to help her patients feel better as soon as possible and to provide strong support at every step of the treatment process.

Rachel Berton-Sniderman Psy.D. – Registered Psychological Assistant (PSB94025276)

Dr. Rachel is a post-doctoral fellow and a Psychological Assistant working under the supervision of Sonia Greaven, Ph.D.  She received her Psy.D. and M.A. in Clinical Psychology at the California School of Professional Psychology, Los Angeles. She received her B.A. in Intensive Psychology with Honors, at UC Santa Cruz. Her doctoral dissertation focused on early childhood anxiety.
Dr. Rachel has training and experience working with children, adolescents and adults. She has worked as a Behavioral Interventionist, providing children and adolescents with behavioral support and intervention in both home and school-based settings. She has experience and specialized training in working with trauma, ADHD, depression, anxiety and OCD. She also spent a year of her training working in an intensive outpatient treatment program (IOP) for moderate to severe obsessive compulsive disorder (OCD) and anxiety.

Dr. Rachel specializes in the treatment of anxiety disorders including OCD, panic and phobias utilizing Cognitive Behavioral Therapy (CBT) and Exposure Response Prevention (ERP). She also incorporates parent support, life skill development and mindfulness-based coping skills into her treatment as appropriate to meet each individual’s needs.

Publications and Scholarly Contributions by Dr. Greaven

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Peer Reviewed Published Manuscripts


Vallis, T.M., Greaven, S.H., & Leddin, D. (2002). What are we going to do with you? Gastroenterology service providers’ perception of “difficult to manage” IBD patients.  Canadian Journal of Gastroenterology, 16 (2), 87-93.

Greaven, S. H., Santor, D. A., Thompson, R. & Zuroff, D.C. (2000). Adolescent self-handicapping, depressive affect, and maternal parenting styles. Journal of Youth and Adolescence, 29(6), 631-646.

Blake, K. & Greaven, S.H. (1999). Reports of new approaches in medical education: How to recruit and follow adolescent standardized patients. Academic Medicine, 74 (5), 584.

Blake, K. & Greaven, S.H. (1999). Adolescent girls as simulators of medical illness. Medical Education, 33, 702-703.

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Peer Reviewed Invited Symposium


Greaven, S.H. & Santor, D.A. (1999). Timing of transitions in adolescence. Part of a symposium on attachment across the lifespan, organized by Elaine Scharfe, presented at the 60th Convention of the Canadian Psychological Association, Halifax, NS, Canada.
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Published Abstracts (Refereed)


Massi, M. & Greaven, S.H. (2019). Coping with Success. Proceedings of the Twenty-sixth Annual Convention of the International OCD Foundation, 20.

Solomon, A., Massi, M. & Greaven, S.H. (2019). Cards Against OCD: A fun & Interactive Workshop for Parents and Kids. Proceedings of the Twenty-sixth Annual Convention of the International OCD Foundation, 41.

Smith, E., Massi, M., Quinlan, K., & Greaven, S.H. (2018). Let’s Talk About Sex, Baby. Proceedings of the Twenty-fifth Annual Convention of the International OCD Foundation, 31.

Greaven, S.H. & Santor, D.A. (2000). Prevalence and perceived importance of transitions in adolescence. Proceedings of the Sixty-first Annual Convention of the Canadian Psychological Association, 41 (2a), 52.

Greaven, S.H. & Santor, D.A. (1999). Timing of transitions in adolescence. Proceedings of the Sixtieth Annual Convention of the Canadian Psychological Association, 40 (2a), 1.

Greaven, S.H., Yazbek, M. & Assh, D. (1998). Group therapy: A three-stage model. Part of a workshop entitled Psychosocial treatments as an adjunct to pharmacotherapy management in bipolar disorders in adolescents. Proceedings of the Eighteenth Annual Meeting of the Canadian Academy of Child Psychiatry, 5.

Greaven, S.H., Santor, D.A., & Kusumakar, V. (1998). Life stress in adolescents with mood disorders. Proceedings of the Forty-fifth Annual Meeting of the American Academy of Child and Adolescent Psychiatry, 14, 96.

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Scientific Poster Presentations (Refereed)

Blake, K., Greaven, S.H., Gusella, J. & Wakefield, S. (2002) Adolescent girls as standardized patients with risk-taking behaviors: Evaluation of potential risks and benefits. Poster presented at 3rd Annual DME Symposium on Medical Education, Halifax, NS, Canada.

Greaven, S.H., & Santor, D.A. (2000). Prevalence and perceived importance of transitions in adolescence. Poster presented at the 61st Convention of the Canadian Psychological Association, Ottawa, ON, Canada.

Vallis, T.M., Leddin, D., & Greaven, S.H. (1999). The narcotic dependent, refractory IBD inpatient: Better management comes from better understanding. Poster presented at Gastro 99, Vancouver, BC, Canada.

Greaven, S.H., Santor, D.A., and Kusumakar, V. (1998). Life stressors and depressive severity in mood disordered adolescents. Poster presented at the 106th Convention of the American Psychological Association, San Francisco.

Greaven, S.H., Santor, D.A., and Kusumakar, V. (1998). Life stress in adolescents with mood disorders. Poster presented at 45th Convention of the American Academy of Child and Adolescent Psychiatry, Anaheim, CA.

Kusumakar, V., Yazbec, M. and Greaven, S.H. (1997). Case presentation of early-onset bipolar disorder. Presentation given at the 44th Convention of the American Academy of Child and Adolescent Psychiatry, Toronto, Ontario, Canada.

Greaven, S.H., Santor, D.A., Thompson, R., and Zuroff, D.C. (1997). Is self-handicapping in adolescent girls related to mothers’ parenting? Poster presented at the 105th Convention of the American Psychological Association, Chicago, IL.