Autism Screening vs. Diagnosis: What Parents Can Expect

Hearing that your child has “screened positive” for autism can feel frightening. It helps to know that screening and diagnosis are two separate steps. A screening tool can tell you whether a closer look is needed. It cannot tell you whether your child is autistic.

What is screening?

Screening is a quick check, usually a questionnaire, to find children who may need a fuller assessment. Many paediatricians recommend autism screening at routine visits around 18 and 24 months, and at any time a parent or doctor has concerns.

The most widely used tool for toddlers is the M-CHAT-R/F (Modified Checklist for Autism in Toddlers, Revised with Follow-Up). Parents answer 20 simple yes-or-no questions about their child’s everyday behaviour, such as whether they point to show you things or respond to their name. If the score suggests a concern, the doctor asks follow-up questions to clarify the answers.

What a screening result means

• A positive screen means your child should have a full developmental assessment. Some children who screen positive are not autistic, but many have another developmental need, such as a language delay, that still deserves support.
• A negative screen is reassuring, but it does not rule autism out. If you are still concerned, say so. No screening tool catches every child.

What is a diagnostic assessment?

A diagnosis is made by a trained specialist, such as a developmental paediatrician, child psychiatrist, clinical psychologist or a team of professionals. A full assessment usually includes:

• A detailed developmental history. The specialist will ask about pregnancy, birth, early milestones, play, communication, behaviour, sleep, eating and family history.
• Observation and structured play. Tools such as the ADOS-2 use play and conversation to observe social communication and behaviour in a consistent way.
• Information from others. Reports from nursery, school or therapists show how your child manages in different settings.
• Other checks. A hearing test, and sometimes speech and language, cognitive or motor assessments, help build a full picture and rule out other explanations.

Assessments can take place over one long visit or several shorter ones. You may receive the outcome on the day or at a follow-up meeting, along with a written report.

Possible outcomes

• An autism diagnosis, often with a description of your child’s strengths and support needs
• A different diagnosis, such as a language disorder, ADHD or global developmental delay
• No diagnosis now, with a plan to review your child’s development later

How to prepare

• Bring notes about your concerns and any milestone records.
• Bring short videos of your child at home, especially of behaviours that worry you.
• Bring reports from nursery, school or therapists.
• Write down your questions in advance. It is easy to forget them on the day.

Do not wait for a diagnosis to get support

Waiting lists for assessments can be long. The good news is that your child does not need a diagnosis to start getting help. Speech and language therapy, occupational therapy and parent coaching can all begin based on your child’s needs. Early support helps, whatever the final outcome.

After a diagnosis

A diagnosis can bring relief, grief, or both. Take your time. Ask the specialist for a written plan, information about local support and parent groups, and advice on any medical checks that are recommended, such as genetic testing. Your child is the same child they were before the assessment. You now simply have a better map for supporting them.

How FXMed can help

Once your child has a diagnosis or is waiting for one, we can help you look after their physical health. Our Autism Support program works alongside your child’s paediatrician, therapists and school. It does not aim to cure or change autism. It focuses on the physical health issues, such as digestion, nutrition and sleep, that can make everyday life harder.

This article is for general education and does not replace advice from your own doctor or care team. If you are worried about your child’s development or health, please speak to a qualified professional.