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What is the Autism Diagnostic Interview-Revised (ADI-R)?
The Autism Diagnostic Interview-Revised (ADI-R) is a structured, in-depth interview a trained clinician conducts with a parent or caregiver as part of a comprehensive autism assessment. It is not a test the child sits and is never used alone. It explores a child's developmental history across three areas: communication and language, reciprocal social interaction, and restricted or repetitive behaviours and interests. Clinicians often pair it with a play-based child observation to form one rounded understanding.
In this answer 5 sections
A careful, structured conversation with parents that helps clinicians understand a child's developmental story — that is the heart of the ADI-R.
In short
The Autism Diagnostic Interview-Revised (ADI-R) is a structured, in-depth interview that a trained clinician conducts with a parent or main caregiver to gather a detailed developmental history of a child being assessed for autism. It is not a test the child sits, and it is never used alone — it is one trusted piece of a wider assessment. The interview gently explores three core areas: communication and language, social interaction, and repetitive or restricted behaviours and interests.
What the ADI-R assesses
Because you, the parent, know your child best, the ADI-R draws on your everyday observations. A trained interviewer asks open, structured questions about both your child's current behaviour and how they developed in their early years. The conversation focuses on three domains:
- Communication and language — how your child uses words, gestures, and back-and-forth conversation, and how language unfolded over time.
- Reciprocal social interaction — how your child shares attention, plays with others, makes eye contact, and responds to people emotionally.
- Restricted, repetitive behaviours and interests — patterns such as intense focused interests, routines, or repetitive movements.
The interview is detailed and can take a couple of hours, because its strength lies in capturing the full developmental picture rather than a single snapshot. Clinicians often pair it with a play-based, child-facing observation (such as the ADOS) so that what is reported and what is seen come together into one rounded understanding.
When it is used
The ADI-R is used by qualified clinicians as part of a comprehensive autism assessment, usually when there are already questions or observations worth exploring carefully. It is a clinical tool, not a screening checklist or an online quiz — and a warm, unhurried conversation with the right professional is exactly where it belongs.
The Pinnacle way
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care, never from an app or form. Our team brings together structured tools like the ADI-R alongside play-based observation and, where helpful, autism therapy to understand the whole child and build an individualised plan.
Trusted sources
WHO ICD-11 framing of autism spectrum disorder; the American Academy of Pediatrics and HealthyChildren guidance on autism evaluation; ASHA resources on communication assessment in autism.
Next step — If you have questions or observations about your child's development, book a developmental review with a Pinnacle clinician to understand the right next steps for your family.
CONNECT THE ANSWER TO YOUR CHILD’S DAY
Something to notice. Something to discuss.
What to notice
The ADI-R is a clinical tool, not a screening checklist — it should be administered by a trained clinician as part of a full assessment, alongside a child-facing observation, never used alone or as an online quiz.
In everyday life
Before any assessment, jot down notes about your child's early development — first words, how they play with others, and any routines or favourite repeated activities. These everyday memories give the clinician a richer, truer picture.
Bring your observations and questions to your child’s professional. Choose activities that suit your child’s comfort, abilities and agreed plan.
Bring your questions to a first visitQuestions families ask
Is the ADI-R a test my child has to take?
No. The ADI-R is a structured interview conducted with you, the parent or main caregiver. It draws on your knowledge of your child's development rather than asking your child to complete tasks.
Can the ADI-R diagnose autism on its own?
No. It is one valuable part of a comprehensive assessment. Clinicians combine it with a play-based, child-facing observation and their overall clinical judgement before reaching any conclusion.
How long does the ADI-R take?
It is a detailed interview that can take a couple of hours, because it explores your child's full developmental history rather than a single snapshot.
FOLLOW THE SOURCE
References behind this answer.
- Organisation website · further readingWHO ICD-11: autism spectrum disorder
- Organisation website · further readingAAP HealthyChildren: autism evaluation
- Organisation website · further readingASHA: communication assessment in autism
References are supplied with this answer. An organisation homepage offers further reading; it does not establish an independent review of this page.
Content attribution: SETU Consortium · Pinnacle Blooms Network.
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General information supports a conversation with an appropriately qualified professional. Advice, goals and support depend on the individual child.