What happens at my child's first ABA session?

Mostly questions, paperwork and play. The first sessions are assessment, not treatment: a BCBA takes your history, watches your child, and runs a skills assessment, with tools like the VB-MAPP or the ABLLS-R as two common examples, before anybody writes a goal. Then the behavior technician spends the early sessions pairing, which means becoming someone your child wants around before a single demand gets placed. If a stranger is running drills on your child on day one, something is out of order.

What actually happens in the room?

An intake interview with you, consent and privacy paperwork, insurance details, and then observation. The BCBA asks what a hard morning looks like, what your child loves, what you have already tried, what you want to be different in six months. Your child plays and the analyst watches how they play, communicate, respond to their name, handle a change. A skills assessment gets run across sessions, usually in short pieces, sometimes over two or three weeks. You may be asked to fill out rating forms. Nothing that happens in these sessions should look like drilling. Ask up front how many assessment sessions to expect and when the written plan will be ready.

What is pairing and why does it come first?

Pairing is building rapport before placing demands, and it is the part that makes everything after it work. In practice it looks like the technician following your child's lead, playing what your child wants to play, handing over the things your child likes, and asking for almost nothing in return. Pairing can look like NOTHING is happening, and parents who are paying for these hours sometimes panic at that. It is not wasted time. A child who does not want the adult in the room will not learn from that adult, and a program that skips this step buys itself weeks of escape behavior later. Ask the technician what pairing looks like for your child specifically.

What is my job while this is going on?

You are two things: the source of the history, and the person who is with your child for the rest of the week. Caregiver training is a named component of ABA programs in published practice guidance, not an optional extra, so ask when your sessions are scheduled, who runs them, and what you will practice. Bring what you already know, including what sets your child off, what calms them, what words or signs or device they use, and what a good day looks like. Ask to be in the room sometimes and ask what to do with your hands when you are. Ask how you will hear about progress, how often, and in what form.

What should be in the treatment plan?

Baseline data showing where your child is starting, goals written in specific measurable language you can read without a glossary, the recommended hours and where they will be delivered, who supervises the technicians and how often, the caregiver training component, and how progress will be measured and reported back to you. If the plan works on reducing a behavior, it should also name what your child gets taught to do instead, because a behavior that gets something for a child does not simply disappear. Ask for a plain-language version if the document reads like a claim form. You are entitled to understand what is being done with your child, in full, before it starts.

What are the red flags in a first session?

A weekly hour count quoted before any assessment. A plan with no supervision schedule. A plan aimed at stopping a behavior with nothing taught to replace it. Being asked to leave and then told nothing about what happened while you were gone. A provider who will not tell you which BCBA is responsible for your child's case, or will not give you the name to look up in the public certificant registry the Behavior Analyst Certification Board maintains. Distress waved off as manipulation. Any pressure to sign today. Trust what you saw in the room, ask about it directly, and ask for the answer in writing. You can change providers, and asking questions early is how you avoid needing to.

• Ask how many assessment sessions to expect and when the written treatment plan will be ready.
• Ask which BCBA is responsible for your child's case, then look up the name in the BACB certificant registry.
• Ask when your caregiver training sessions are scheduled and what you will practice in them.
• Read the treatment plan before it starts and ask for a plain-language version if you cannot follow it.
• Download the free ABCs of Autism guide as your one-source starting point.

Prefer to start with one guide? Download the free ABCs of Autism guide →

Next: Child just diagnosed what to do

• Council of Autism Service Providers, Applied Behavior Analysis Practice Guidelines for the Treatment of Autism Spectrum Disorder (Version 3.0, 2024; 2nd ed. “Practice Guidelines for Healthcare Funders and Managers,” 2014) https://www.casproviders.org/asd-guidelines
• Behavior Analyst Certification Board, “Verify BACB Certification” certificant registry (current) https://www.bacb.com/verify-certification/
• CDC, “Treatment and Intervention for Autism Spectrum Disorder” (current) https://www.cdc.gov/autism/treatment/index.html
• Behavior Analyst Certification Board, “BCBA” certification requirements (current) https://www.bacb.com/bcba/

Last updated 2026-09-02. This page is general information, not medical advice. Talk with your child's clinician about your specific situation.