SANTA MONICA, CALIFORNIA
Testing psychologist.
Religious trauma educator.
GREY MATTER PSYCHOLOGICAL ASSESSMENT | TRAUMASTERY
I help children, teens, and adults get clear answers through comprehensive psychological testing for ADHD, autism, and learning differences. I also train therapists and coaches across the country to ethically support religious trauma and cult recovery.
A note on the past: I spent over a decade in trauma therapy practice before moving fully into assessment and education. I no longer provide therapy.
FOR CLIENTS + REFERRERS
Grey Matter Psychological Assessment
Comprehensive, evidence-based testing for ADHD, autism, and learning differences for children, teens, and adults.
Reports built to be used, not filed away. We give real recommendations that can help you turn your neurodivergence into your superpower.
I help you understand how your or your child’s brain works
Reports in 2 to 6 weeks
Expert psychologists and neuropsychologists to help you understand what’s getting in your way
Santa Monica offices and virtual across California
FOR THERAPISTS + COACHES
Traumastery
Continuing education courses and certifications to train therapists and coaches to ethically treat religious trauma and cult abuse.
CE courses and certification track
150+ therapists trained
Built by a religious trauma survivor and clinician
Learn science-backed ways to intervene with your most vulnerable clients
About Dr. Gideon
Quincee Gideon, PsyD, is a licensed psychologist based in Santa Monica, California. She is the founder of Grey Matter Psychological Assessment, where she leads comprehensive psychological testing for ADHD, autism, and learning differences for children, teens, and adults, and the founder of Traumastery, a continuing education platform that has trained more than 150 therapists and coaches to work ethically with religious trauma and cult recovery.
Earlier in her career she spent over a decade specializing in trauma therapy, including EMDR and complex PTSD, before moving fully into assessment and education. Although no longer provides therapy, she continues to use those therapeutic skills to provide emotionally-safe, thoughtful, and neurodiversity-affirming evaluations and trauma-informed course.
Media and Speaking
Common Questions
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Quincee Gideon, PsyD, is a licensed psychologist in Santa Monica, California. She runs Grey Matter Psychological Assessment, a testing practice specializing in ADHD, autism, and learning differences, and founded Traumastery, which trains therapists in religious trauma and cult recovery.
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No. Dr. Gideon no longer provides therapy. Her clinical work is focused on psychological testing at Grey Matter Psychological Assessment, and she trains therapists through Traumastery.
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A psychological assessment practice in Santa Monica serving children, teens, and adults, with comprehensive evaluations for ADHD, autism, learning differences, exam accommodations, and forensic referrals.
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A continuing education platform offering courses and certification that train therapists and coaches to ethically treat religious trauma and cult abuse.