Director of Research

Bryan Cheng
Director of Research, Ph.D.
Dr. Bryan Cheng is the Director of Research of the Global Mental Health Lab at Teachers College, Columbia University. He received his B.S. in Developmental Psychology from the University of Minnesota in the Twin Cities, and his Ph.D. in Clinical Psychology from Teachers College, Columbia University. He completed his doctoral internship at Mount Sinai St. Luke's and West Hospitals where he focused on the care of individuals suffering from psychotic and personality disorders, and continues to stay on faculty where he supervises psychiatry residents and psychology interns. 
Dr. Cheng provides oversight on various projects in the lab as a co-investigator and methodologist. His previous research includes an assessment of the needs of Syrian refugees in Jordan and validation of mental healthcare instruments for that population, as well as utilization of new statistical methodology to investigate trends and trajectories in mental health outcomes in large clinical epidemiological data. He is also an IPT supervisor and trainer, and specializes in other modalities and forms of therapies including Cognitive Behavioral Therapy (CBT) and Dialectical Behavioral Therapy (DBT). He also teaches two classes in the Masters program - Introduction to Clinical Interviewing, and Introduction to Cognitive Behavioral Therapy. His research interests continue to include the role of rumination in depression, the economics of mental health interventions in health systems, and the development and cultural validation of mental health measures in minority and underserved populations.  

Director of Policy and Advocacy


Dr. Willis is a psychologist by profession with 20 years of experience in academic, government and non-government organizations engaging in teaching, mentoring, research, social policy and social development activities leading to leadership roles that emphasize turnaround social development strategies. Dr. Willis received her doctorate in Psychology with a specialization in intellectual & developmental disabilities and has worked in academia as an Assistant Professor and Head of the Psychology Program. For the past 12 years Dr Willis was responsible for providing strategic advice on integrated social, health, and economic development in Dubai via policy, legislative and programmatic recommendations, including a Dubai-wide master plan for service delivery, human resources, partnership development and capital investment. The approach included applied research tools, rigorous analysis, monitoring and evaluation, to ensure that all strategies and policies are contextually appropriate, fiscally responsible, are evidence-based. She developed macro-level social development strategies to drive policy development and impact assessment that include the Dubai Disability, Mental Health, Early Childhood Development and Parenting Strategies.

Currently, Sandra is freelancing while holding 2 active positions as a Visiting Scholar in the Global Mental Health Lab at Teachers College, Columbia University, and as Director of Learning & Development in World Enabled, at the University of California - Berkley. 

Director of Training


Kathleen F. Clougherty is a senior Interpersonal Psychotherapy (IPT) trainer and supervisor at the New York State Psychiatric Institute, Instructor in Clinical Psychiatric Social Work (In Psychiatry) at Columbia University, an instructor at the Columbia University School of Social Work, and a private practitioner specializing in the treatment of depression in adolescents and adults. She is the co-author, along with Gregory Henrichsen, of Interpersonal Psychotherapy for Older Adults. Ms. Clougherty has been a co-developer, on-site trainer and supervisor in several major international IPT studies including an adaptation of individual IPT for adults in rural India, an adaptation of group IPT for depressed men and women in southwest Uganda, and an adaptation of group IPT for depressed adolescents in internally displaced persons’ camps in northern Uganda. She currently is trainer and supervisor for a randomized controlled trial of IPT for older adults with traumatic grief, and she is developing adaptations of IPT for the World Health Organization and the Millennium Villages Project. Ms. Clougherty has done extensive training and supervision both nationally and internationally for social workers, psychiatrists, and psychologists. She was trained in IPT by Dr. Gerald Klerman, the co-developer of IPT. Ms. Clougherty received her MSW from Columbia University School of Social Work.

Senior Strategic Advisor

Catherine Wolstencroft

Catherine completed an undergraduate degree in economics at Dartmouth College followed by a ten-year career in international finance at JP Morgan. She then earned a Master's degree in clinical psychology, with a concentration in global mental health and trauma, at Teachers College, Columbia University. Her work within the US and abroad is focused on humanitarian efforts within low resource communities, education, and the environment.

Catherine serves as strategic advisor to the Global Mental Health Lab. She is collaborating with the Lab on training and capacity-building projects for Interpersonal Psychotherapy and has co-authored IPT manuals for adaptation. Catherine also serves on the international advisory board for the Columbia-WHO Center for Global Mental Health.




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