If you are reading about the autism assessment process, you are probably somewhere between a nagging worry and a referral letter, and wondering what actually happens next. The good news is that an autism assessment is not a test your child can pass or fail. It is a careful, structured look at how your child communicates, plays and relates to others, designed to understand them and to point towards the right support.

Quick answer An autism assessment is a multi-part evaluation carried out by qualified clinicians, usually a developmental paediatrician, child psychiatrist or clinical psychologist, often with speech and language and other therapists. It typically includes a detailed developmental history from parents, direct observation and play-based activities with the child, standardised tools, and information from nursery or school. It usually takes more than one session, and ends with a feedback meeting and a written report. Concerns can be raised from around 18 months, and families do not need to wait for a formal diagnosis before starting helpful therapy.

When to consider an autism assessment

Consider asking for an assessment if you or others who know your child notice differences in social communication or behaviour that persist over time. Common early flags include limited eye contact or response to their name, fewer gestures such as pointing, delayed or unusual speech, little interest in other children, strong need for sameness, and repetitive movements or play. Our article on the early signs of autism in toddlers covers these in more detail.

Routine developmental screening in primary care often happens around 18 and 24 months, but you do not need to wait for a scheduled check. If your concerns are there, raise them. Screening questionnaires only suggest whether a closer look is needed. They do not diagnose.

Screening is not diagnosis A screening tool, whether at the paediatrician or online, flags the chance that autism may be present. Only a full assessment by qualified clinicians can confirm or rule it out. A ‘positive’ screen is a reason to look closer, not a conclusion.

Who carries out the assessment

Autism is diagnosed by clinicians, not by a single test. Depending on the health system and age of the child, the team may include:

• A developmental paediatrician or child psychiatrist, who leads the medical assessment and usually makes the diagnosis.
• A clinical psychologist, who often runs structured observation and cognitive or developmental testing.
• A speech and language therapist, who assesses understanding, expression and social communication.
• An occupational therapist, who may look at sensory processing, play and daily living skills.

Some families see a multidisciplinary team in one place. Others move between clinics. In the UAE, assessments and diagnoses should be carried out by appropriately licensed professionals, so it is worth asking about the credentials of whoever is evaluating your child.

What happens at an autism assessment: step by step

1. Intake and questionnaires. Before the appointment you will usually complete forms about pregnancy, birth, health, milestones and current concerns. Nursery or school reports are often requested.
2. Parent interview. A clinician takes a detailed developmental history, asking about early communication, play, routines, sensory responses and daily challenges. This is one of the most important parts, because you know your child best.
3. Direct observation and play. The clinician plays with your child using structured activities, often with a standardised tool such as the ADOS-2 (Autism Diagnostic Observation Schedule). The aim is to see how your child communicates, shares attention and engages in pretend play.
4. Developmental or cognitive testing. Depending on age, tests of language, learning and adaptive skills help build a full picture and identify co-occurring needs.
5. Information from other settings. Observations from nursery or school show how your child functions outside the home.
6. Feedback and report. The team brings together everything they learned, explains their conclusions and gives a written report with recommendations.

How long it takes and how to prepare

Most assessments take place over one to several sessions, ranging from around an hour to several hours in total, with the report following afterwards. Waiting times vary widely between services, so it is reasonable to ask at the outset how long each stage is expected to take.

• Bring any previous reports, a list of your concerns and, if possible, short videos of behaviours you see at home that may not show up in the clinic.
• Tell your child, in simple words, that they are going to play with a new person. Avoid framing it as a test.
• Make sure your child is fed and rested, and bring a comfort item or favourite snack if helpful.
• Write down your questions beforehand. It is easy to forget them in the room.

What an autism assessment looks for

Clinicians assess against the criteria in the DSM-5 or ICD-11, which describe two main areas:

• Persistent differences in social communication and interaction, such as back-and-forth conversation, nonverbal communication and developing relationships.
• Restricted, repetitive patterns of behaviour, interests or activities, including sensory differences and strong need for routine.

They also consider other explanations or co-occurring conditions, such as language disorder, ADHD, anxiety or developmental delay. This matters, because the signs can overlap. Our article on autism and ADHD explains how.

After the assessment: what comes next

Whatever the outcome, the report should explain your child’s strengths and needs in plain language and recommend next steps.

• If autism is diagnosed, the report will outline recommended supports, which may include early intervention, speech and language therapy, occupational therapy, ABA and parent coaching. A diagnosis does not change who your child is. It opens doors to understanding and support.
• If autism is not diagnosed, your child may still have another developmental difference that benefits from help. Ask what the team recommends, and whether to review again later.
• If the answer is unclear, especially in very young children, clinicians may suggest a review in six to twelve months. Meanwhile, therapy can usually start.

Importantly, you do not need to wait for a formal diagnosis to begin helping your child. If a child has speech delay, sensory difficulties or social challenges, therapy can address those needs right away.

Common worries parents have

“What if they label my child?” A diagnosis is a description of how your child’s brain works, used to unlock understanding and support, not a limit on their future.

“Should I wait and see?” Developmental differences do not usually resolve by waiting, and earlier support tends to be more effective. Asking for an assessment is cautious, not alarmist.

“What if it is nothing?” Then you have peace of mind and a clearer view of your child’s development. Either answer is useful.

How we support families in Abu Dhabi

Ability Pediatric Rehabilitation Medical Center is a CARF-accredited, MOH and DoH licensed child development centre in Abu Dhabi. Our clinical psychology and therapy teams support families from first concerns through to ongoing therapy, including early intervention, speech and language therapy and parent training.

If you have concerns about your child’s development and want to talk through the options, book a consultation. We will listen to your concerns, explain the process clearly and help you take the next step with confidence.

Frequently asked questions

How is autism diagnosed in children?

Through a comprehensive assessment by qualified clinicians, combining a detailed developmental history from parents, direct observation and play with the child, standardised tools such as the ADOS-2, and information from nursery or school. No single test or scan can diagnose autism.

At what age can autism be assessed?

Concerns can be raised and assessed from around 18 months, and sometimes earlier. Diagnosis is often more certain from around age 2 to 3, though assessment can be done at any age, including in older children and adults.

How long does an autism assessment take?

It varies. Many assessments run across one to several sessions, with a written report following. Ask the service for its expected timeline at the beginning.

Do I need a referral for an autism assessment?

This depends on the clinic and your insurance. Some services accept direct bookings, while others, or insurers, require a paediatrician’s referral. It is worth checking before booking.

Can my child start therapy before getting a diagnosis?

Yes. Therapy is based on your child’s needs, such as speech delay or sensory difficulties, rather than on a label. Waiting for a diagnosis is not necessary to begin helping.

Is an online autism test enough?

No. Online questionnaires can raise awareness but cannot diagnose. If a result worries you, use it as a prompt to seek a professional assessment.

What if my child is diagnosed with autism?

You will receive a report with recommended supports. Many families begin with speech and language therapy, occupational therapy, ABA or early intervention, along with parent training, tailored to the child’s profile.

Sources

• CDC: Diagnosis of Autism Spectrum Disorder
• NHS: Autism assessment
• American Academy of Pediatrics: Autism