Dr. Lesley Miller

Practice Director, Neuropsychologist & Clinical Psychologist (Adults) - All Locations & Online

Dr. Lesley Miller is a clinical psychologist and neuropsychologist providing adult psychological and neuropsychological assessment and psychotherapy in Burlington, St. Catharines, and online across Ontario. She is the Director of Brookside Therapy & Assessments.

Her practice focuses on complex adult presentations, particularly where neurodevelopmental, neurological, trauma-related, and mental health factors overlap.

Areas of Clinical Focus

Dr. Miller’s primary areas of practice include:

Traumatic Brain Injury (TBI) – neuropsychological assessment and treatment
Autism Spectrum Disorder (Adults) – diagnostic assessment and functional supports
Attention-Deficit/Hyperactivity Disorder (ADHD) – assessment and psychotherapy
Trauma & Posttraumatic Stress Disorder (PTSD)
Anxiety Disorders
Chronic Pain and health-related psychological adjustment
Gender Identity and identity-related concerns

She works with adults up to age 70.

Assessment & Therapy Services

Dr. Miller provides:

Neuropsychological assessment for brain injury, cognitive concerns, and diagnostic clarification
Psychological assessment for ADHD, Autism Spectrum Disorder, trauma-related and mental health conditions
Psychotherapy for trauma, anxiety, ADHD, identity-related concerns, and adjustment following injury or illness

Therapy approaches include Cognitive Behaviour Therapy (CBT), Cognitive Processing Therapy (CPT), and Eye Movement Desensitization and Reprocessing (EMDR). Her work is trauma-informed, neurodiversity-affirming, and LGBTTIQ-affirmative.

Training & Professional Background

Dr. Miller completed her Ph.D. in Counselling Psychology at the University of Toronto.

Since 2000, she has held clinical and research positions at:

Centre for Addiction and Mental Health
(Inpatient/Outpatient Psychological Assessment Service; WSIB-funded Psychological Trauma Program)
University Health Network – Toronto Rehabilitation Institute (Traumatic Brain Injury Recovery Study)

Her master’s and doctoral clinical training placements were completed at:

Sunnybrook Health Sciences Centre
(Neuropsychology & Aging Program)
Centre for Addiction and Mental Health
(WSIB-funded Work, Stress, and Health Program)
St. Joseph’s Healthcare Hamilton
(Anxiety Treatment & Research Centre; Neuropsychology Consultation Service; Behavioural Medicine)

Professional Affiliations & Certifications

Dr. Miller is a member of:

She is certified to conduct medical-legal and catastrophic impairment assessments (mental and behavioural) by:

Dr. Miller previously served as President of the Board of the Brain Injury Association of Peel/Halton and is a Clinical Affiliate of the Redpath Centre, a private clinic specializing in ADHD and Autism Spectrum Disorder.

Miller, L.S., Colella, B., Mikulis, D., Maller, J., & Green, R.E.A. (2013). Environmental enrichment may protect against hippocampal atrophy in the chronic stages of traumatic brain injury. Frontiers in Human Neuroscience. doi September 24, 2013.

Miller, L.S. (2011). Recovery from moderate to severe traumatic brain injury: Hippocampal atrophy, environmental enrichment, and implications for functional outcome.Doctoral dissertation: University of Toronto, Canada.

Bagby, R.M., Marshall, M.B., Bury, A., Bacchiochi, J.B., & Miller, L.S. (2006). Assessing underreporting and overreporting response styles on the MMPI-2. In J.N. Butcher (Ed.), MMPI-2: A Practitioner’s Guide. Washington, DC: American Psychological Association.

Bagby, R.M., Marshall, M.B., Basso, M.R., Nicholson, R.A., Bacchiochi, J., & Miller, L.S. (2005). Distinguishing bipolar depression, major depression, and schizophrenia with the MMPI-2 clinical and content scales. Journal of Personality Assessment, 84(1), 89-95.

Scheibe, S., Bagby, R.M., Miller, L.S., & Dorian, B.J. (2001). Assessing posttraumatic stress disorder with the MMPI-2 in a sample of workplace accident victims. Psychological Assessment, 13(3), 369-374.

Pronouns

she/her