Understanding the ADOS-2

The Autism Diagnostic Observation Schedule, Second Edition (ADOS-2), is a well recognised tool used as part of a comprehensive Autism assessment. It is internationally regarded as a gold-standard instrument that helps clinicians gather meaningful observational data in a structured yet naturalistic way.

At The Hummingbird Centre, we use the ADOS-2 thoughtfully as one part of the broader diagnostic picture. It contributes to the assessment process by helping identify patterns of communication, social interaction, and behaviours that may be consistent with Autism traits. Importantly, the ADOS-2 is not a checklist or test to pass or fail — it is a clinical observation framework designed to inform understanding.

What Happens During an ADOS-2 Session?

The ADOS-2 session involves a series of structured, play or conversation based activities selected to match the person’s age, language, and developmental level. These activities are designed to create opportunities where certain traits associated with Autism may emerge in a supportive setting.

Some of the activities may appear unusual or unexpected  — this is normal. Each task has been carefully designed to support clinical observation of specific behaviours or responses. We encourage participants and families to trust in the process and know that each component plays a role in building a clearer picture of the person being assessed.

During the session, our clinicians observe how the person responds and interacts. We always consider their comfort, preferences, and style of communication. The goal is to make the experience respectful, strengths-based, and as relaxed as possible. The ADOS-2 is never used on its own or in a way that causes distress.

The ADOS-2 and the Bigger Picture

We understand that many Autistic individuals and families are cautious about assessments that focus only on problems. At The Hummingbird Centre, we take a different approach. We’re interested in the whole person — not just what’s hard, but what’s strong, unique, and meaningful.

The ADOS-2 is just one tool we may use. We also include:

• A full developmental and social history
• Interviews with parents, health professionals and partners/friends (if needed)
• Questionnaires and reports from teachers, support professionals, or others
• Conversations with the client and their support network to learn about strengths, challenges, and what kind of support works best

Sometimes, another tool like a clinical interview or the MIGDAS may be more suitable instead of the ADOS-2. Our clinicians will always explain what they’re using and why — and make sure the process feels respectful, clear, and tailored to the person.

If you’re interested in learning more about Autism assessments or want to speak to our team please call us on 02 4946 0919 or click the link below.