1 in 50
According to the 2019 Canadian Health Survey on Children and Youth, about 1 in 50 children and youth aged 1 to 17 in Canada had an autism diagnosis
Primary source Public Health Agency of Canada (2024) Verified 2024-03-26
Autism Screening Tools: What They Can and Cannot Tell You
Screening is a brief first step that identifies who should receive a full assessment.
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Autism Screening Tools: What They Can and Cannot Tell You False positives and false negatives occur. Screening and diagnosis are not the same thing. No online quiz can diagnose autism. Screening is a brief first step that identifies who should receive a full assessment. Read the guide www.endthewaitontario.com/autism-test
Download English captions (WebVTT)Screening is a brief first step that identifies who should receive a full assessment. A short explainer with music and captions. 56 seconds.
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- Running time 0:47 Getting a diagnosis
CAMH Adult Autism Assessment in Ontario
A full adult autism assessment, wherever it happens, usually involves developmental history, diagnostic interview, and often standardized measures. - Running time 0:45 Getting a diagnosis
Find the autism diagnosis path in your province
Autism diagnosis involves a full developmental assessment by a qualified professional - Running time 0:54 Getting a diagnosis
How Long Does an Autism Assessment Take?
Private waits vary, so ask clinics about timing, visits and when the written report will arrive.
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Facts 3
Sources 3
Evidence supports autism screening and intervention commencing in the first 2 years of life — earlier identification directly enables earlier intervention during the highest neural plasticity window
Primary source Zwaigenbaum L, Bauman ML, Stone WL, et al. (2015) Verified 2015-10-01
WHO recommends accessible, community-based early interventions for children with autism. Timely evidence-based psychosocial interventions improve communication and social engagement
Primary source World Health Organization (2025) Verified 2025-09-17
Open complete source list(3)
Last system verification: 2026-11-03. Next scheduled update: 2027-02-01.
About this page
Check the author’s context, review method, and how to report an error.
Written by Spencer Carroll
Founder & Autism Advocate
Lived experience: Parent of autistic child in the OAP system