A comprehensive guide to understanding autism levels 1, 2, and 3, plus developmental milestones and the EYLF framework. Essential information for parents, carers, and educators supporting individuals with autism spectrum disorder across Australia.
Autism Spectrum Disorder (ASD) is a developmental condition that influences the way people communicate, interact, and process the world around them. Because autism is highly individual — no two people experience it the same way — clinicians often use levels of support needs (Levels 1, 2, and 3) to describe how much assistance may be required in daily life.
Understanding these levels helps parents, carers, and educators make sense of a diagnosis, plan for the right supports, and celebrate developmental progress. This article explores the levels of autism, the role of GDD (Global Developmental Delay), and how developmental milestones are tracked through the EYLF (Early Years Learning Framework).
Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterised by:
The word spectrum is important. It reflects that autism varies widely: some people may need minimal adjustments in daily life, while others may need intensive, ongoing support.
Clinicians classify autism into three levels, based on the amount of support required. These levels are not about "severity" in a simple sense but about practical needs in day-to-day functioning.
These categories help guide therapy, educational planning, and access to services.
People at Level 1 may live independently with the right supports, but benefit greatly from tailored strategies.
At Level 2, support is ongoing and substantial, often involving multiple professionals.
Level 3 autism is often referred to as "severe autism" in informal contexts, but it is more accurate to describe it as requiring very substantial support.
Global Developmental Delay (GDD) is a diagnosis for children under five who show delays in at least two developmental areas, such as:
Some children with GDD later receive an autism diagnosis, while others do not.
The Early Years Learning Framework (EYLF) is Australia's national framework for guiding learning and development in early childhood. It helps educators track milestones and tailor learning environments.
Domains monitored include:
For children with autism, the EYLF provides a way to measure progress in a supportive, holistic way, recognising both challenges and strengths.
Connect with qualified professionals who understand autism and can provide the right level of support.
Search for Autism TherapistsA: Yes. With development and intervention, support needs may shift — for example, a child initially assessed at Level 2 may later function more like Level 1.
A: Many describe Level 3 as "severe," but the clinical definition is "requires very substantial support." The term "severe" can oversimplify unique strengths and challenges.
A: Clinicians use behavioural observations, parent interviews, and developmental history. Assessments are ongoing, not one-off.
A: Yes, particularly in very young children. GDD may be a temporary diagnosis until more specific assessments are possible.
A: They help track progress and identify areas for support, particularly in the EYLF framework for young children.