About Our Team

As pediatric neuropsychologists, we have training in both clinical psychology and neuropsychology, the study of how the brain affects our thinking and behaviour. Our specialized training enables us to evaluate and help manage children with brain disorders and injuries.  

We pride ourselves on providing high-level service and expertise that customizes each assessment or consultation based on the individual needs of the student and their family.  Our feedback and follow-up reports are comprehensive but understandable, with user-friendly and evidence-based recommendations that outline clear next steps.  Our assessments are always led by PhD level psychologists.

DR. TRICIA WILLIAMS

Neuropsycholologist

DR. NADDLEY DESIRE

Neuropsychologist

DR. RIVKY GREEN
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Neuropsychologist

DR. SHANNON SCRATCH

Neuropsychologist

​Dr. Tricia Williams, Ph.D., C.Psych., is a clinical neuropsychologist registered in the Province of Ontario. ​ Dr. Williams is one of the few Canadian clinical neuropsychologists board certified through the American Board of Professional Psychology (ABPP). She is also a subspecialist in pediatric neuropsychology.  


​Dr. Williams is currently a neuropsychologist and Associate Scientist at the Hospital for Sick Children in the division of Neurology.
She was recently appointed as the Garry Hurvitz Brain Health Innovator at the Center for Brain and Mental Health.  In 2023, Dr. Williams won the Elizabeth Manson Award for her outstanding clinical and program contributions in the area of child and youth mental health. 

These credentials and experience reflect Dr. Williams’s expertise working with populations with known neurocognitive and mental health concerns (e.g., epilepsy, traumatic brain injury, concussion, stroke, prematurity, cancer), individuals with developmental, learning, and intellectual disabilities as well as emotional and behavioural disorders (e.g., ADHD, anxiety, OCD, epression, Tourette’s).  

Dr. Williams was also a member of Ontario Psychological Association’s Learning Disability Consensus Working Group that informed the OPA LD Consensus Guidelines. She has also published an overview and critique of this process.  

Dr. Williams is also an NHL Concussion consultant to the Toronto Maple Leafs and Toronto Marlies and offers concussion consultation and assessment to children and youth in her private practice.  

Dr. Williams founded TW Psychology in 2012 as a sole practitioner, and incorporated the practice in 2020.  Dr. Williams strives to provide comprehensive and personalized assessment and consultation services that are readily understandable and translatable, and meaningful in directing evidence-based next steps to optimize the student’s academic and personal success. 

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Dr. Naddley Désiré, Ph.D., C.Psych., is a trilingual (English, French, Haitian Creole) clinical neuropsychologist registered in the Provinces of Ontario and Québec.  She received her Ph.D. in Clinical Neuropsychology at the Université de Montréal, and initially worked at CHU Sainte-Justine Research Centre where she collaborated on several multisite research projects investigating the neuropsychological outcomes in children and adolescents following traumatic brain injury.

Dr. Désiré went on to complete a 2-year postdoctoral fellowship in pediatric neuropsychology at Alberta Children’s Hospital (which provides eligibility for board certification through the American Board of Clinical Neuropsychology). Dr. Désiré is currently a staff neuropsychologist at the Hospital for Sick Children in the Divisions of Neurology and Neurosurgery where she provides culturally responsive assessment, consultation, and intervention services for children, adolescents, and young adults presenting with neonatal brain injury, traumatic brain injury, brain tumours, vascular malformations, epilepsy, genetic conditions (e.g., TSC, NF1), craniosynostosis, and hydrocephalus. 
 
Dr. Désiré is also actively involved in several initiatives that focus on addressing, examining, and dismantling barriers to equity, diversity, and inclusion (EDI) within the field of neuropsychology. As a result of her leadership and commitment to social justice, Dr. Désiré was selected as an Editorial Fellow at one of the top scientific journals in neuropsychology to continue her work on improving EDI in neuropsychology practice and research. 
 
Dr. Désiré joined TW Psychology in September 2020. She is currently providing psychological and neuropsychological assessments in English and French to children, adolescents, and young adults (age 3-24) presenting with neurocognitive concerns (e.g., concussion, acquired brain injury, epilepsy, prematurity, genetic conditions), neurodevelopmental disorders, learning and intellectual disabilities, as well as emotional and behavioural disorders (e.g., ADHD, anxiety, depression,). She also offers services in Haitian Creole (i.e., Kreyòl). 
 
Dr. Désiré’s approach to assessment is focused on the client’s and families’ needs, using evidence-based/best practices and research. She assists families in understanding their child’s strengths and weaknesses, while providing culturally appropriate, adapted and tailored recommendations. She also ensures that findings are communicated in a clear and compassionate way.

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Dr. Rivky Green, PhD (supervised practice) is a post-doctoral fellow in clinical and neuropsychology at the Hospital for Sick Children in Toronto, where she provides neuropsychological assessments and parenting intervention services for children with behavioural, neurodevelopmental, and/or neurological concerns.  

Dr. Green received her clinical masters and doctorate at York University in Toronto, specializing in pediatric neuropsychology and health psychology. Dr. Green competed a one-year predoctoral residency in clinical neuropsychology and health psychology at SickKids where she provided neuropsychological assessments, consultations with schools and other professionals, and health psychological intervention services for children and adolescents with neurological and health conditions.  

Dr. Green has worked with youth presenting with a range of conditions, including neurodevelopmental (ADHD, learning disabilities, intellectual disabilities), neurological (epilepsy, encephalitis, MS), and medical (chronic pain, Ehlers-Danlos Syndrome) conditions. In addition, Dr Green has worked as a therapist at SickKids for five years to provide families with parenting strategies, psychoeducation, and therapeutic services.  

Dr. Green’s approach to assessment is client-centred and collaborative, and she uses a refined approach that considers developmental processes, biological predispositions, neuropsychological considerations, and interpersonal and systemic factors. Using a prevention lens, Dr. Green also considers implementing proactive strategies by optimizing parenting approaches and providing recommendations to enhance health outcomes before deficits occur or worsen. She ensures to write and convey results in a clear and understandable way that are tailored to families’ needs. 

Dr. Green joined TW Psychology in February 2023. She is currently providing psychological and neuropsychological assessments in English to children, adolescents, and young adults (ages 3-24) presenting with a range of neurologic conditions, neurodevelopmental disorders (i.e., ADHD), learning and behavioural challenges, mental health and stress concerns, and somatic (physical) complaints. She also provides parenting support and coaching.

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Dr. Shannon Scratch is a clinical neuropsychologist registered with the College of Psychologists of Ontario to work with clients across the lifespan. She trained at the University of Melbourne in Australia which is well-known for its integrated training in neuropsychology.

Dr. Scratch returned home to Canada in 2016 where she has been working at Holland Bloorview Kids Rehabilitation Hospital. She is also a clinician scientist and director of a research lab at the Bloorview Research Institute that specializes in creating interventions for children and young people who have experienced acquired brain injury or concussion, and their families. She has received international recognition as an emerging leader in this field and was recently awarded the Early Career Award (2023) from the International Neuropsychological Society.

Dr. Scratch believes that assessments and intervention complement each other.  Joining TW Psychology in September 2023, Dr. Scratch works with clients and their families to understand their goals, strengths, experiences, and challenges. She uses the assessment as a tool to guide recommendations or make diagnoses that will best support clients in their daily lives, including school, work, activities, and peer relationships.

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