What to Expect in Your Child’s First ABA Session

What is the first ABA session?

The first session in ABA therapy (Applied Behavior Analysis) is the starting point of your child’s individualized program. It usually follows the intake assessment, where your BCBA already learned about your child’s history, strengths, and goals. This first hands-on session is where your child meets their therapy team and the team begins to see your child as they really are — how they play, communicate, and respond to the world around them.

Think of it less as “therapy day one” and more as a friendly introduction. The focus is connection, not correction. Whether therapy happens in your living room through in-home ABA, in a clinic, or over telehealth, the goal of the first visit is the same: help your child feel safe and let the team gather the information they need.

Who has a first ABA session?

Any child beginning an ABA program has a first session — most often children diagnosed with autism spectrum disorder, and frequently toddlers and preschoolers entering early intervention. Older children starting therapy, or those switching providers, go through the same welcoming first visit. It doesn’t matter whether your child is highly verbal or non-speaking, easygoing or anxious about new people; the session is shaped around your individual child.

What actually happens in the first session

Building rapport (“pairing”)

ABA calls this pairing: the therapist becomes associated with fun. They’ll follow your child’s lead, join their favorite play, offer preferred toys or snacks, and keep demands very low. This step matters because a child who trusts and enjoys their therapist learns far more readily in the weeks ahead.

Observation and getting to know your child

While playing, the team watches closely — how your child communicates wants, plays with toys, handles transitions, and responds to their name or simple requests. They’re noticing strengths just as much as challenges.

Gathering baseline data

ABA is data-driven, so the therapist quietly notes a starting point for the skills your plan will target. This baseline is how progress gets measured later. If challenging behavior is a concern, the information gathered may feed into a functional behavior assessment to understand why it happens.

Talking with you

Expect real conversation with the parent or caregiver. The team will confirm your priorities, answer questions, and start showing you how you’ll be involved through parent training. You are part of the team from day one.

The first session at a glance

How to prepare your child (and yourself)

• Keep it low-key. You don’t need to coach or warn your child. A simple, calm “a new friend is coming to play” is plenty.
• Have favorites handy. Note the toys, snacks, and activities your child loves — they help the therapist connect quickly.
• Pick a comfortable space. For in-home sessions, a familiar, low-distraction room works best.
• Jot down your questions and goals. What matters most to you — communication, sleep, mealtimes, tantrums? Share it.
• Let your child be themselves. A meltdown or a shy moment is useful information, not a bad start.

Benefits of a well-run first session

A thoughtful first visit sets the tone for everything that follows. It helps your child feel safe with a new person, gives the BCBA an accurate real-world picture to refine the treatment plan, and helps you feel confident about the road ahead. When pairing is done well, children are noticeably more willing to engage in later sessions — which means faster, smoother progress.

What outcomes can you expect?

Don’t expect dramatic change after one visit — that’s not the goal. What you should see is a therapist who connected with your child, a clearer sense of your child’s starting point, and a plan for how sessions, hours, and goals will unfold. Over the following weeks, as therapy ramps up, your BCBA tracks data at every session and reviews progress with you regularly, adjusting goals as your child grows. If cost or coverage is on your mind, our team verifies your insurance benefits and explains them in plain language before therapy scales up.

Common misconceptions

• “My child will be tested and could fail.” There’s no test to fail. The first session is observation and rapport-building.
• “They’ll dive straight into intensive drills.” Quality ABA starts with connection. Structured teaching is introduced gradually, at your child’s pace.
• “I should stay out of the way.” The opposite is true — your input and involvement make therapy work better.
• “If my child cries, therapy isn’t right for them.” Big feelings on day one are normal and expected. A skilled team meets your child where they are.

Frequently asked questions

How long does the first ABA session last?

Most first sessions run about one to two hours. Your BCBA may adjust the length based on your child’s age, comfort, and attention on the day.

Should I stay in the room during the first session?

Usually yes, especially for younger children. Your presence helps your child feel safe, and it lets the team involve you and answer questions in real time. Your therapist will guide what works best for your child.

Will my child start learning new skills right away?

The first session focuses on rapport and gathering baseline information rather than intensive teaching. Structured skill-building is introduced gradually over the following sessions as your child grows comfortable.

What should my child wear or bring?

Comfortable clothes they can move and play in are ideal. There’s no need to bring anything special — though a favorite toy or comfort item is always welcome.

Helpful resources

• CDC — Treatment and Intervention for Autism Spectrum Disorder
• Behavior Analyst Certification Board (BACB)
• AAP HealthyChildren.org — Autism

Clinically reviewed by Teba Aijaz, MS, BCBA, LBA, Founder & Clinical Director.