ADOS-2 or ADI-R? How they differ and which to choose
The two instruments most often used in autism spectrum assessment. They do not compete with each other - they show two different kinds of data.
ADOS-2 shows how a person functions here and now, while ADI-R shows how their development unfolded. In thorough spectrum assessment the two are most often used together. If you have to start with one, it is usually ADOS-2.
| Criterion | ADOS-2 | ADI-R |
|---|---|---|
| Type of instrument | Structured observation and tasks with the person assessed | Structured interview with a parent or carer |
| What it shows | Current functioning: communication, interaction, play, behaviour | Developmental history: milestones, early signs, changes over time |
| Who takes part | The person assessed + the assessor (a parent depending on age and module) | A parent or carer who knows the developmental history well |
| Must the child be present | Yes - the assessment is based on observation | No - the child does not need to attend |
| Format with us | Up to 3 appointments: parent interview (approx. 60 min), observation, discussion | In-depth interview + written summary |
| Price | PLN 650 (promotional until the end of 2026, standard PLN 700) | PLN 450 |
| Document | Written report, within 21 working days | Written summary, within 21 working days |
| Is this already a diagnosis | No - the gold standard for observation, but one element of the process | No - one element of the assessment process |
Choose ADOS-2 if…
The starting point in most cases
- You want to begin an assessment and do not know where to start
- You need an evaluation of a child's or adult's current functioning
- A counselling centre or doctor has asked for an "ADOS assessment"
- The person assessed can attend an observation session
Add ADI-R if…
Completing the picture with developmental history
- The picture from observation is not clear-cut
- The early years of development matter
- You want the fullest possible documentation for a doctor or counselling centre
- There is no one who knows the early development in detail - then ADI-R is difficult
Why one assessment is often not enough
Autism spectrum is recognised on the basis of a pattern of functioning over time, not a single result. An observation captures one meeting, and children may behave differently in a new setting than at home or at school. A developmental interview adds the context no observation can reconstruct.
Where to start
- Initial consultation (PLN 150)
We discuss your observations and concerns, review existing documentation and propose a path.
- The assessment or assessments
Most often ADOS-2, supplemented where needed by the ADI-R interview.
- Discussion and report
We explain the findings in plain language and issue a written report within 21 working days.
Frequently asked questions
Cannot find your answer? Call us - we will gladly clear up any doubts.
Is ADOS-2 enough to diagnose autism?
ADOS-2 alone is not a diagnosis. It is a standardised observational assessment regarded as the gold standard, but it is one element of the process. The diagnosis itself is made by a medical specialist.
How much do both assessments cost together?
ADOS-2 is PLN 650 (promotional price until the end of 2026) and ADI-R PLN 450. Whether both are needed is decided after an initial consultation (PLN 150).
Will a psychological and pedagogical counselling centre accept these assessments?
Yes. We use certified instruments, and our reports are recognised by counselling centres and medical specialists.
Can ADI-R be done without the child?
Yes. ADI-R is an interview with a parent or carer - the child does not need to attend.
In what order are these assessments carried out?
We usually begin with the parent interview, then carry out the ADOS-2 observation. If an in-depth developmental interview is needed, ADI-R follows as the next stage.
Have questions?
Book a consultation.
We will answer all your questions and help you choose the right path for assessment or therapy.
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