As a child and adolescent psychiatrist at the Child Study and Treatment Center, I am deeply inspired by the resilience of the youth we serve and by the collaborative spirit of our multidisciplinary teams. My work is grounded in curiosity, compassion, and respect for the complex systems that shape young people’s lives. My approach integrates evidence-based psychopharmacology with developmental and trauma-informed care, while always centering around the individual’s unique story and strengths. I value the relational and systemic dimensions of psychiatry: the interplay between family, community, and policy that influences recovery and growth. The multidisciplinary, relational model at CSTC reflects these values and continues to shape how I think about psychiatry: not only as a science, but as a deeply human endeavor.
My research and clinical interests include third-wave, cognitive-behavioral interventions for adolescents and young adults, family-based and parenting-related support for families of youth engaging in risky or challenging behavior, suicide prevention, prevention of child maltreatment, increasing equitable access to evidence-based services, and effective collaboration with clients who have been labeled as “resistant” by prior treatment providers.
Dr. Katherine Seldin is a faculty member and licensed clinical psychologist in the University of Washington’s Department of Psychiatry and Behavioral Sciences. Before joining this department, Dr. Seldin completed her PhD in Clinical Psychology at the University of Washington, residency at Northwestern University Feinberg School of Medicine, and fellowship at the University of Ilinois Chicago.
Dr. Seldin specializes in delivering evidence-based cognitive behavioral therapies (CBTs), including mindfulness-based and exposure-based psychotherapies such as Acceptance and Commitment Therapy (ACT) and Exposure and Response Prevention (ERP). Her research interests include mood disorders, sleep, digital intervention, emotional impulsivity, and ecological momentary assessment methodology.
Lupita Santillan, PhD, is an Acting Assistant Professor in the department of Psychiatry and Behavioral Sciences. Dr. Santillan is an attending psychologist for the Early Childhood Clinic and the CALMA Clinic at Seattle Children’s Hospital. She is passionate about increasing access to evidence-based early childhood interventions and the provision of mental and behavioral health in Spanish. Her clinical training has focused on providing care to families and children with developmental delays and neurodevelopmental disabilities. Dr. Santillan’s research focuses on the development, implementation, and efficacy of evidence-based behavioral treatments to support children with developmental delays and neurodevelopmental disabilities.
Christina Warner, MD (she/her) is the attending psychiatrist for the Early Psychosis Clinic and Partial Hospitalization Program at Seattle Children’s Hospital. She has clinical expertise in mood disorders, psychosis spectrum disorders, First Episode Psychosis, chronic suicidality, mood dysregulation, neurodiversity, and Dialectical Behavior Therapy.
Dr. Warner is a Washington native and graduate of the Seattle Public School system with a vested interest in expanding access to high quality mental health care in her community.
Caitlin Courshon, PhD (she/her), is an attending psychologist for the Behavior and Attention Management (BAM) Program within Outpatient Psychiatry at Seattle Children’s Hospital and an Acting Assistant Professor in the Department of Psychiatry and Behavioral Sciences at the University of Washington. Dr. Courshon has clinical expertise in the treatment, consultation, and assessment of children with disruptive behaviors and their families, including, but not limited to, neurodevelopmental disorders such as attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, and disruptive behavior disorders. Her clinical work integrates evidence-based treatments, including parent behavior management training (PBMT), cognitive-behavioral therapy (CBT), and dialectical behavior therapy (DBT).
Dr. Courshon’s current academic interests focus on researching clinical outcomes of PBMT programs and contributing to ongoing program development to expand services for caregivers navigating challenges related to home-school communication and disruptive behaviors in school settings. She is deeply committed to helping children improve their behaviors, empowering caregivers and educators to enhance their self-efficacy in supporting children with disruptive behaviors, and fostering healthy, safe, and inclusive environments across home, school, and community settings.
I am a child and adolescent psychiatrist committed to improving outcomes for young people who face complex difficulties and systemic barriers. As a clinician, I aim to establish meaningful therapeutic relationships with young people and those supporting them, while also working to advocate for public policy and health systems that improve access to quality mental healthcare.
My main role includes providing inpatient care to older adolescents at the Child Study and Treatment Center through the Behavioral Health Administration, Washington State Department of Social and Health Services, and acting as training lead for psychiatry at this site. My clinical interests include the transition from adolescence to adulthood, the emergence of mood disorder and psychosis, early intervention for personality disorder, and developmental disabilities. I have academic interest in medical education, health service development, and the social determinants of mental health.
My work focuses on the development, dissemination, and implementation of tools for the assessment and treatment of autism spectrum disorder. I am also interested in transdiagnostic interventions for autism spectrum disorder to increase efficacy for individuals and families, as well as access to care. My clinical pursuits include conducting diagnostic evaluations for autism for youth of all ages, as well as running groups and classes for autistic individuals and their families.
Sheena Friesen, PhD (she/her), is the attending psychologist for the Child Program on the inpatient Psychiatry and Behavioral Medicine Unit at Seattle Children’s Hospital and Assistant Professor in the Department of Psychiatry and Behavioral Sciences at the University of Washington. She has clinical expertise in disruptive behavior disorders, comprehensive assessment, Dialectical Behavior Therapy, Exposure Therapies, Parent Training, and Trauma-Focused Cognitive Behavioral Therapy.
Dr. Friesen’s research interests broadly focus on advancing knowledge of least restrictive interventions in acute and complex care contexts, trauma-informed care, and interventions designed to address children’s disruptive behavior problems. She has collaborated on and co-led efforts to design and implement a multi-tiered, Modified Positive Behavioral Interventions and Supports (M-PBIS) model of care aimed at increasing positive behavior interventions, reducing restraint and PRN use, and ameliorating racial gaps in care delivery.
Dr. Friesen received her Ph.D. in School Psychology from the University of Washington in Seattle, WA. She completed her pre-doctoral internship training at Johns Hopkins School of Medicine and Kennedy Krieger Institute and went on to complete her postdoctoral fellowship in acute care and clinical psychology at Seattle Children’s Hospital.
