About Us

Your First Step to Wellness

Behavioral Wellness Clinic (BWC) clinicians are independent psychotherapists and mental health professionals practicing at a shared professional facility in Chadds Ford, Pennsylvania. Each clinician specializes in several different areas of counseling and mental health care, maintaining the highest professional standards.

BWCC therapists have a cognitive-behavioral orientation, which means they tend take an active approach to treatment. Therapists use proven techniques to facilite progress and help clients meet individual goals. It is important to us that clients understand how therapy will help them and what to expect. Our therapists will take time to explain their conceptualization of the problem and how treatment will work for you.

Anyone struggling with anxiety, phobia, traumatic memories, OCD, or related conditions can benefit from the services of BWC therapists. Additionally, individuals seeking counseling for interpersonal issues may experience positive changes in their intimacy, communication, and other obstacles that may interfere with relationships.

Chris Leins, M.A.

Psychological Associate

Chris Leins

Chris Leins, MA, is a therapist at the Behavioral Wellness Clinic & Delaware Valley OCD Clinic in Chadds Ford, PA, with an office convenient to Philadelphia and Delaware.

Chris is a reader, a thinker, and a devoted dad. He is serious about people, canoeing, and microbrews. Chris was trained at Eastern University in psychodynamic theory and Emotion-Focused Therapy. He also studied, and is certified to do Functional Analytic Psychotherapy (FAP), an evidence-based intervention for interpersonal- and relationship-change. He was trained by Dr. Gareth Holman, a Seattle-based psychologist and foremost writer on FAP. And Chris has been privileged to receive direct and ongoing training from Dr. Monnica Williams, a psychologist and professor at University of Connecticut, and respected authority on obsessive-compulsive disorder (OCD) and race-based trauma.

Chris' areas of expertise include treating OCD and related disorders, including Hoarding Disorder, Trichotillomania, Excoriation Disorder [skin-picking], Body Dysmorphic Disorder, and Tic Disorders. He also treats PTSD, Social Anxiety Disorder, Generalized Anxiety Disorder, Life Transitions, and Major Depression. Chris has ample experience working with all subtypes of OCD, including OCD related to sexually taboo fears, self- and other-injury, religious scrupulosity, contamination, and health anxiety.

Chris is competent in matters related to cross-cultural counseling. His experience includes providing quality psychotherapeutic services to ethnic, sexual, and religious minority-groups. In fact, Chris has coauthored several publications pertaining to the diagnostic identification and treatment of racial trauma, and conducted presentations at annual conferences for both the International OCD Foundation (Chicago, IL, 2016), and the Association of Behavioral and Cognitive Therapies (New York City, NY, 2016) on cultural issues. Additionally, Chris has worked with numerous religious clients to incorporate the Bible into Exposure and Ritual Prevention, the most empirically supported treatment for OCD.

Selected Publications & Presentations

Williams, M. T., & Leins, C. (2016). Race-Based Trauma: The Challenge and Promise of MDMA-Assisted Psychotherapy. Multidisciplinary Association for Psychedelic Studies (MAPS) Bulletin, 26(1), 32-37.

Williams, M. T., Tellawi, G., Davis, D. M., Viscusi, J., & Leins, C. (2016, July). OCD and Minority Status. Panel discussion at the International OCD Foundation Annual Conference, Chicago, IL (1.5 CEs).

Leins, C., DeLapp, C. L., & Williams, M. T. (2016, October). A Model for Understanding Racial Trauma Within a DSM-5 Framework. Poster presented at the 2016 Association for Behavioral and Cognitive Therapies Convention, New York City, NY.

Betsy Van Dyke, Psy.D.

Psychological Associate

Betsy Van Dyke, Psy.D.

Dr. Betsy Van Dyke is a psychological associate working under the supervision of Dr. Monnica Williams at the Behavioral Wellness Clinic located in Chadds Ford, PA. Dr. Van Dyke completed her Bachelor’s degree in Psychology at Lake Superior State University located in Sault Ste. Marie Michigan. She received her Master’s and Doctoral degree in Clinical Psychology at the Illinois School of Professional Psychology located in Schaumburg, Illinois. Prior to joining the clinic, she gained substantial experience working with severe, complex, and diverse clients in a variety of contexts ranging from residential treatment facilities to inpatient forensic settings.

Dr. Van Dyke has received specialized training in Exposure and Ritual Prevention (EXRP), Prolonged Exposure, Acceptance and Commitment Therapy (ACT), and Functional Analytic Psychotherapy (FAP). Dr. Van Dyke treats children, adolescents, and young adults with a variety of presenting issues. Her main specialties include the treatment of obsessive compulsive disorder (OCD) and anxiety spectrum disorders. She has gained extensive experience in treating a variety of OCD presentations that includes sexual, violent, contamination, and religion/scrupulosity subtypes. She is also adept in the treatment of posttraumatic stress disorder (PTSD), major depression, health anxiety, hoarding, trichotillomania, excoriation disorder, social anxiety, phobias, body dysmporphic disorder, as well as body image and eating disturbances.

Monnica Williams, Ph.D., ABPP

Clinical Director & Supervisor

Monnica Williams

Dr. Monnica T. Williams is the Clinical Director of the Behavioral Wellness Clinic, with locations in Louisville, KY and Chadds Ford, PA. Dr. Williams is also an Associate Professor in the Department of Psychological Sciences at the University of Connecticut. She is licensed as a psychologist in two states and is credentialed in Kentucky as a Health Service Provider. She has expertise in the treatment of post-traumatic stress disorder (PTSD), obsessive-compulsive disorder (OCD), hoarding, and anxiety disorders using empirically-supported cognitive-behavioral techniques. She also helps people who want to improve their relationships, who are experiencing life stress, or who are struggling with stress due to discrimination.

Prior to her work in Louisville, Dr. Williams was an Assistant Professor at the Center for the Treatment and Study of Anxiety in Philadelphia, at the University of Pennsylvania School of Medicine, where she trained under, Dr. Edna Foa for four years. She also was the first tenured minority female in the Department of Psychological and Brain Sciences at the University of Louisville, where she served as the Director of the Center for Mental Health Disparities. Dr. Williams completed her undergraduate studies at MIT and UCLA. She received her Master's and Doctoral Degrees in clinical psychology from the University of Virginia, where she conducted research in the areas of major mental illness, tests and measurement, and ethnic differences. She completed her clinical internship at McGill University Health Centre, Montreal General Hospital Site.

Dr. Williams has published over 75 scientific articles and chapters. She is on the Scientific Advisory Board of the International OCD Foundation, the board of Louisville National Alliance on Mental Illness (NAMI) and has also served on the board of directors for the Delaware Valley Association of Black Psychologists, and the NAMI Philadelphia Main Line chapter.

Dr. Williams provides training and supervision for therapists in the assessment and treatment of obsessive-compulsive disorder (OCD), posttraumatic stress disorder (PTSD), social anxiety disorder, and cultural competence. She uses cognitive-behavioral therapies (CBT), including prolonged exposure (PE), exposure and ritual/response prevention (Ex/RP), and functional analytic psychotherapy (FAP). She also provides therapy for other medical and mental health professionals.

Dr. Williams lives in Mansfield, CT, with her husband and two children.

Featured Articles

Read some featured articles from Dr. Williams' blog on Psychology Today Culturally Speaking:

More about Dr. Monnica Williams...

Barry Rebeck, M.D.

Online Psychiatrist

Barry Rebeck

Dr. Barry Rebeck, psychiatrist, is originally from upstate New York, where he graduated from Syracuse University with a degree in Chemistry and Laboratory Sciences. He obtained his medical degree at Ross Medical College. After medical school he completed his adult psychiatry residency at the Illinois State Psychiatric Institute/ University of Illinois Program. in Chicago and went on to complete a geropsychiatry fellowship at Rush Presbyterian St. Luke's Medical Center/ Rush Medical College in Chicago.

He has worked in a variety of psychiatric settings, including private practice and academic centers, working for the Illinois Department of Mental Health as a Medical Director, and employed by various not-for-profit organizations.

He has extensive experience working with a wide variety of individuals having multiple psychiatric conditions. His treatment philosophy is based upon the premise that each individual requires an individualized form of treatment. He strives to help empower his clients as a means to utilize their strengths in order to achieve their own definition of recovery. He offers various treatment modalities such as psychopharmacology (medication), promotes psychotherapy of various forms, and believes foremost in working collaboratively with his clients and others that the client identifies as important to facilitate in their recovery process.

Dr. Rebeck has lived in Louisville since 2003.

Jasmine Terwilliger

Office Manager

Jasmine Terwilliger

Jasmine Terwilliger is the office manager for the Behavioral Wellness Clinic. She ensures that operations are running smoothly and oversees the work of the other office staff. This includes phone intakes, payment processing, and scheduling.

Jasmine is currently a senior at the University of Louisville, majoring in Nutrition Science and minoring in Chemistry and Math. She is in the University Honors Program and plans on pursuing graduate studies in Nutrition and Culinary Arts. When not working or studying, she enjoys baking, singing, and spending time with her family.


Terwilliger, J. M., Bach, N., Bryan, C., & Williams, M. T. (2013). Multicultural versus Colorblind Ideology: Implications for Mental Health and Counseling. In Psychology of Counseling, A., Di Fabio, ed., Nova Science Publishers. ISBN-13: 978-1-62618-410-7.

Davis, D., Steever, A., Terwilliger, J. M., & Williams, M. T. (2012). The Relationship between the Culture-Bound Syndrome Koro and Obsessive-Compulsive Disorder. In Psychology of Culture, G. R. Hayes & M. H. Bryant, eds., Nova Science Publishers. ISBN-13: 978-1-62257-274-8.

Jessica Dowell, B.A.

Clinic Assistant

Jessica Dowell

Jessica Dowell, BA, is part of the administrative team for the Behavioral Wellness Clinic. She helps to maintain daily functioning at the clinic as well as scheduling. She is also a research assistant who has assisted in several research projects, including validation of measures studies. Jessica recently graduated from the University of Louisville, with a bachelors degree in Psychology and a bachelors degree in Political Science. She will be pursuing graduate studies in Counseling Psychology in the future.

Selected Research Presentations

Ellsworth, M., Tellawi, G., Dowell, J., Salmon, P., & Williams, M. (2015, March). The Role of Self-Compassion in Mental Health Outcomes of Sexual Minorities. Poster presented at Kentucky Psychological Association Spring Academic Conference, Midway College, Midway, KY.

Dowell, J. N., Davis, D. M., & Williams, M. T. (2016, October). Measuring Disgust Sensitivity and OCD Symptom Dimensions across Ethnic Groups. Poster presented at the 2016 Association for Behavioral and Cognitive Therapies Convention, New York City, NY.


Contact Us & Directions

Behavioral Wellness Clinic &
Delaware Valley OCD Clinic
225 Wilmington West Chester Pike
Chadds Ford, PA 19317
Phone: (484) 324-2749

Contact us by email  

Clinical Director: Monnica Williams, PhD
Office Manager: Jasmine Terwilliger
Business Manager: Matthew Jahn