To receive an autism diagnosis, individuals typically undergo a diagnostic and behavioural assessment that includes clinical observations, interviews, and standardized testing. Professionals refer to the Diagnostic and Statistical Manual (DSM-5) criteria to ensure an accurate evaluation. In some cases, an autism screening may be the first step before a formal evaluation is conducted.

Learning disabilities and behavioural challenges can be improved with therapy and treatment — but identifying the root cause accurately first is a critical step in that journey.

The Adaptive Behavior Assessment System is an evaluation tool used during the assessment process to measure how a person manages practical, social, and everyday skills across different age groups. In multidisciplinary autism assessments, it helps clinicians build a comprehensive understanding of adaptive functioning, daily functioning, emotional functioning, and executive functioning.

This information supports a more accurate diagnosis by showing how someone functions at home, at school, and in other real-world settings — and helps shape treatment plans, school accommodations, and the full written report.

An autism screening is a preliminary check to identify signs of autism spectrum disorder and determine if further testing is needed. A full assessment is a comprehensive evaluation that includes in-depth testing and a thorough review of developmental history to determine if an individual meets the criteria for a formal ASD diagnosis.

Following the assessment, therapy sessions for children, young adults, and adults are shaped by the findings — ensuring that support is targeted, appropriate, and effective.

The Autism Diagnostic Interview Revised (ADI-R) is a structured parent or caregiver interview used in the autism assessment process to gather detailed information about a person's early development, communication, social interaction, and behaviour. It is commonly used alongside clinical interviews, observations, and other standardized tools.

The ADI-R helps clinicians explore developmental patterns across children, teens, and adults — contributing to a more accurate picture of autism spectrum disorder. It provides insight into executive functioning, learning profiles, school stress, and behavioural concerns, helping families better understand a person's unique strengths and learning style.

As part of a broader, collaborative approach, the ADI-R helps identify the right fit for recommendations, school supports, and services tailored to the individual's overall wellbeing.