# What is the Autism Diagnostic Interview-Revised (ADI-R)?

Canonical: https://pinnacleblooms.org/ask/what-is-the-autism-diagnostic-interview-revised-adi-r-and-what-does-it-assess
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

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.

*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®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) 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](/adi-r) alongside play-based observation and, where helpful, [autism therapy](/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.

## Sources
- WHO ICD-11: autism spectrum disorder: https://icd.who.int
- AAP HealthyChildren: autism evaluation: https://www.healthychildren.org
- ASHA: communication assessment in autism: https://www.asha.org

## Connected topics and perspectives
- Assessments: https://pinnacleblooms.org/ask/assessments
- Parent: https://pinnacleblooms.org/ask/lens/stakeholder/parent
- Definition: https://pinnacleblooms.org/ask/lens/intent/definition
- Measure: https://pinnacleblooms.org/ask/lens/lifecycle/measure
- Screen: https://pinnacleblooms.org/ask/lens/route/screen
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- At what age is the ADI-R used for a child?: https://pinnacleblooms.org/ask/at-what-age-is-the-adi-r-developmental-assessment-used-for-a-child
- What is the ADOS-2 and what does it assess?: https://pinnacleblooms.org/ask/what-is-the-autism-diagnostic-observation-schedule-2nd-ed-ados-2-and-what-does-it-assess

### Understand assessment
- Should My Child Have an ADI-R Assessment?: https://pinnacleblooms.org/ask/should-my-child-have-a-adi-r-assessment-and-what-does-it-involve
- ADI-R indications, strengths and early-childhood limits: https://pinnacleblooms.org/ask/when-is-the-adi-r-indicated-and-what-are-its-strengths-and-limits-in-early-childhood
- ADI-R compared with the AbilityScore developmental assessment: https://pinnacleblooms.org/ask/how-does-the-adi-r-compare-with-the-abilityscore-developmental-assessment

### Explore therapy & support
- What is the ADI-R autism diagnostic interview?: https://pinnacleblooms.org/ask/what-is-the-adi-r-autism-diagnostic-interview