Understand clinical screening tools, what scores mean, and how to get a professional assessment in Canada.
When people search for an "autism test," they are usually looking for a way to understand whether their own — or their child's — traits and behaviours might be consistent with autism. Validated autism screening tools are questionnaires developed and tested by researchers to identify people who may benefit from a full diagnostic evaluation.
This page is a guide to the most widely used screening tools. It is not an interactive quiz. No online quiz can diagnose autism. If screening results concern you, the right next step is to speak with a healthcare provider about a referral for a comprehensive assessment.
If you are concerned about your child showing possible autism signs, visit our guide to autism signs at every age and speak with your paediatrician about whether screening or referral is appropriate.
M-CHAT-R (Modified Checklist for Autism in Toddlers, Revised): Used for children aged 16 to 30 months. This 20-question tool is recommended by the Canadian Paediatric Society as part of routine developmental surveillance. Paediatricians and family doctors may use it at 18-month and 24-month well-child visits. A positive M-CHAT-R result prompts a follow-up interview and, if concerns persist, a referral for full assessment.
AQ-10 (Autism Quotient — 10 item): A validated screening tool for adults and adolescents over 16. It covers social skills, attention switching, communication, and imagination. A score of 6 or above suggests a full diagnostic assessment may be warranted.
AQ-50 and RAADS-R: Longer, more detailed self-assessment instruments used in clinical settings or by adults seeking to understand their own traits before pursuing formal diagnosis. These are not substitutes for professional assessment but can help you articulate your experiences to a clinician.
Learn more about next steps: How to Get an Autism Diagnosis in Ontario
Screening and diagnosis are not the same thing. Screening is a brief, low-burden first step designed to cast a wide net and identify people who warrant further evaluation. Diagnosis is a thorough clinical process that takes hours and involves multiple standardized tools, a detailed developmental history, observation of the individual, and professional clinical judgment.
Only a licensed professional — a psychologist, developmental paediatrician, or psychiatrist — can provide an autism diagnosis. In Ontario, publicly funded diagnostic assessment is available through referral from your family doctor, but wait times vary significantly. Private neuropsychological assessment is available more quickly but costs $2,000–$5,000 or more.
If you believe you or your child may be autistic, do not wait for a perfect score on an online quiz. Speak with a healthcare provider and begin the formal assessment process. An official diagnosis opens the door to services, accommodations, and funding — including Ontario's Ontario Autism Program.
An autism screening test is a brief questionnaire used to identify people who may benefit from a full diagnostic assessment. Screening tools are not diagnostic — they flag potential autism traits and guide next steps. Common tools include the M-CHAT-R for toddlers and the AQ-10 for adults.
Validated screening tools like the M-CHAT-R have reasonable sensitivity and specificity when used appropriately, but no questionnaire can diagnose autism. False positives and false negatives occur. A high score on a screening tool means a professional assessment is warranted, not that autism is confirmed.
Screening is a brief first step that identifies who should receive a full assessment. Diagnosis is a comprehensive evaluation by a qualified professional (psychologist, developmental paediatrician, or psychiatrist) involving standardized tools, developmental history review, and direct observation. Only a diagnosis — not a screening score — confirms autism.
A high score on a screening tool means you should speak with a healthcare provider about a referral for a full diagnostic assessment. In Ontario, you can ask your family doctor or paediatrician for a referral to a developmental paediatrician or psychologist. Be aware that public wait times for assessment can be lengthy.
In Canada, autism diagnosis requires a comprehensive assessment by a registered psychologist, developmental paediatrician, or psychiatrist. You can access public assessment through your family doctor (referral required) or pay privately. Wait times for publicly funded assessment vary by province and region — in Ontario, waits can exceed several years in some areas.
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Verified Facts
1 in 50 — According to the 2019 Canadian Health Survey on Children and Youth, about children and youth aged 1 to 17 in Canada had an autism diagnosis
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
WHO recommends accessible, community-based early interventions for children with autism — timely evidence-based psychosocial interventions improve communication and social engagement
87,692 — children are registered in the Ontario Autism Program
23.1% — 23,875 children enrolled in Core Clinical Services; 20,293 have active funding agreements ()
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