Sophie Cassell, PhD

Licensed Clinical Psychologist, NY · Assessment Consultant & Supervisor

  • Neuropsychological Assessment

  • ADHD

  • Autism

  • Attachment

  • Eating Disorders

  1. English

Sophie is a licensed clinical psychologist in private practice in Greenpoint, Brooklyn, providing both neuropsychological evaluations and therapy to children, teens, and adults. In her assessment work, she specializes in building a comprehensive, holistic understanding of how people operate — integrating psychological functioning, cognitive abilities, and life experience to make sense of their current circumstances.

As a psychotherapist, Sophie emphasizes the importance and impact of early attachments on how we function and relate to others. She helps patients understand and communicate their emotions and needs more comfortably.

Specialties and Areas of Focus

PopulationsAssessment: Autistic and ADHD children, teens, and adults · Learning differences · Mood disorders
Therapy: Children and adolescents · Families · Complex divorce situationsClinical AreasRelationship and attachment issues · Body image & eating disorders · Anxiety · Emotional numbingSpecial InterestsAssessment: Dual diagnoses and the impact of life circumstances · The development and presentation of neurodivergence · The emergence of mood and psychiatric disorders
Therapy: Attachment and relationship difficulties · Eating disorders · Emotional numbing and reconnecting to emotions

Therapeutic Approach and Modalities

Sophie is a warm, collaborative therapist who trusts in her patients' ability to communicate their authentic experiences under the right conditions. She is active and direct, and often uses humor and somatic awareness to help patients deepen their self-understanding.

Unique to her work: In therapy, Sophie aims to create a disarming, safe environment where patients feel welcome to be their true selves. She integrates insight-oriented therapy with direct, action-based work to support meaningful and lasting change.

In neuropsychological evaluations, Sophie draws on her expertise in both neuroscience and psychodynamic therapy — integrating an understanding of the brain and biology with a relational understanding of development and emotional life. This allows her to understand patients through both their inner worlds and their unique neurocognitive makeups.

  • Attachment-focused

  • Relational

  • Systems-based

  • Neurodiversity-affirming

Training and Credentials

Degrees & InstitutionsPhD, Clinical Psychology — Derner School of Professional Psychology, Adelphi University
MSEd, Mental Health Counseling — University of Miami
BA, Psychology — American UniversityCertifications & Specialized TrainingAttachment-Based Family Therapy (ABFT) · Reactivity-Focused Psychotherapy (RFP)Relevant Past Experience & PublicationsBegan career as a teacher at an alternative school, providing a foundation for her interests in therapy and neuropsychological evaluations and an inside view of how to work within the school system · Extensive writing on the impact of attachment on the psychotherapy process

Personal Note

Having lived in three major US cities and visited many more across the US and abroad, I continue to be in awe of the differences between people and cultures that make our world rich — and the similarities that bind us together. I am fortunate that my work as a psychologist affords me continuous opportunities to explore the vast diversity of people and our mental worlds. It is the greatest privilege to be able to do this work every day.

Work with Sophie. Free 20-minute call