General 8 min read
The Difference Between Screening and Full Assessment
Understand the difference between a brief screening and a comprehensive psychological assessment, including when each is appropriate and what the results mean.
Feb 17, 2026
Resources & Guides
Articles and guides about psychological assessments, funding programs, and preparing for your assessment.
Assessment Prep 6 min read
What to Bring to Your Assessment Appointment
A complete checklist of documents, records, and items to bring to your child's psychological assessment appointment, plus what to leave at home.
Feb 12, 2026
For Adults 7 min read
What to Expect from an Adult Assessment
A step-by-step guide to the adult psychological assessment process, including the tools used, the timeline, and what your report will cover.
Feb 10, 2026
For Adults 6 min read
Signs You May Need an Adult Assessment
Many adults with ADHD, autism, or learning disabilities were never assessed as children. Learn the signs that may indicate it is time for a psychological assessment.
Feb 5, 2026
Assessment Prep 7 min read
How to Prepare for Your Child's Assessment Day
Practical tips for the night before and morning of your child's psychological assessment, including sleep, meals, medication, and managing anxiety.
Feb 3, 2026
General 7 min read
What Is a Psychoeducational Assessment?
A foundational guide to psychoeducational assessments: what they measure, how they differ from therapy, who conducts them, and how the results are used.
Jan 27, 2026
For Parents 5 min read
How to Talk to Your Child About Their Assessment
Practical advice for explaining a psychological assessment to your child in a way that feels safe, honest, and supportive.
Jan 20, 2026
Insurance & Funding 4 min read
Ontario Funding Programs for Assessments (DSO, DTC, ODSP)
An overview of Ontario government programs that help cover the cost of psychological assessments, including DSO, DTC, and ODSP.
Jan 13, 2026
For Parents 5 min read
Understanding Your Assessment Report
A plain-language guide to reading and using your child's psychological assessment report, including scores, recommendations, and next steps.
Jan 6, 2026
Ready to Get Started?
Discuss your concerns and learn how a comprehensive assessment can provide the answers you need.
Get In Touch
We're here to help you understand your assessment options. Please call us or send us a message.
Office Hours
Monday - Friday: 9:00 AM - 5:00 PM
Saturday: By appointment
Sunday: By appointment only
Contact Information
Phone: 416-284-5923
Our Location
1 Promenade Circle, Suite 300A
Thornhill, ON L4J 4P8
Cornerstone Psychological Services
Evidence-based psychological and psychoeducational assessments for ages 4+ to adults for ADHD, executive functioning, learning disabilities, autism (ASD), neurodevelopmental, intellectual disabilities, and giftedness with flexible virtual, online and/or hybrid sessions.