What Exactly Is an FBA?

Before a BCBA can help teach your child new skills or reduce challenging moments like severe meltdowns, they have to figure out why those behaviors are happening in the first place. In the ABA world, this “why” is called the function of the behavior.

Kids don’t throw tantrums or engage in unsafe behaviors just to give you a hard time. They do it because that behavior is working for them. It is communicating a need. An FBA is simply the detective work required to translate what your child is trying to say.

Behavior analysts generally look for four main “whys” or functions of behavior:

• To get out of something (Escape): Running away when it is time to brush their teeth or throwing a worksheet on the floor.

• To get attention: Whining, acting out, or pulling on you when you are on a phone call. (Remember, to a child, even negative attention like a scolding is still attention).

• To get something they want (Access): Crying at the grocery store because they want a candy bar, or hitting a sibling to get an iPad.

• Because it feels good (Sensory): Flapping hands, spinning in circles, or chewing on their shirt sleeves because it regulates their nervous system.

During the FBA, the BCBA is simply hanging out, asking you questions, and observing your child to figure out which of these four reasons is driving the behaviors you want to help your child manage.

(For a more clinical look at how behavior professionals view this process, you can read this helpful breakdown from the Child Mind Institute on Functional Behavior Assessments.)

Step 1: Track the “ABCs” Before Your Appointment

You know your child better than anyone in the world. The BCBA is going to rely heavily on your daily experiences. You can make their job much easier by taking some simple notes a week or two before the assessment.

You do not need a fancy spreadsheet. A notebook on your kitchen counter or a note app on your phone works perfectly. When a challenging behavior happens, try to jot down the “ABCs”:

• A – Antecedent (What happened right before?): Were you asking them to put their shoes on? Did a sibling take a toy? Was the room too loud? Did their favorite TV show just end?

• B – Behavior (What exactly did they do?): Try to be specific. Instead of writing “he had a meltdown,” write “he dropped to the floor, cried, and threw his shoe across the room.”

• C – Consequence (What happened right after?): This isn’t about punishment. It just means what was the result? Did you give them the iPad to calm them down? Did you put them in timeout? Did the sibling give the toy back?

Having a few days of these ABC notes will give the BCBA a massive head start in creating a plan that actually works for your family’s daily routine.

Step 2: Gather the Paperwork

Your BCBA will want to see the full picture of your child’s history. Having these documents ready saves time and prevents you from having to dig through filing cabinets while you are trying to talk to the therapist.

Put together a folder containing:

• Your child’s official diagnostic evaluation (from the neurologist, psychologist, or pediatrician).

• Their most recent IEP (Individualized Education Program) if they receive services at school.

• Notes or reports from other therapies they are currently doing, like Speech Therapy or Occupational Therapy (OT).

• A list of their current medications.

Step 3: Prepare the Environment (By Doing Absolutely Nothing)

This is the most common mistake parents make: trying to make everything look perfect.

When the BCBA comes to your home (or when you go to the clinic), do not change your routine to prevent meltdowns. Do not hide the messy parts of your day. If your child struggles with transitions, let the BCBA see that. If mealtime is chaotic, let them see it.

If you spend the whole observation bending over backwards to keep your child perfectly happy and quiet, the BCBA won’t get an accurate picture of what you are dealing with. They are not there to judge the cleanliness of your living room or your parenting skills. They are there to see the real, raw version of your everyday life so they can offer real, practical help. Let the challenging behaviors happen.

Step 4: Talk to Your Child

If your child is old enough to understand, or has language skills, give them a heads-up so they aren’t caught off guard by a stranger in their house. Keep it light, positive, and simple.

You can say something like: “A new friend named Sarah is coming over today to hang out with us and see how we play! She just wants to get to know you.”

Do not tell them it is a doctor’s appointment or a test, as this can cause unnecessary anxiety.

What to Expect on the Day of the FBA

So, what actually happens when the BCBA shows up? The assessment usually takes a few hours and is broken down into two main parts: the parent interview and the direct observation.

The Parent Interview

The BCBA will sit down with you and ask a lot of questions. Some of these questions will be about basic skills (Can they dress themselves? Can they point to things they want?). Other questions will be very specific to problem behaviors. Be totally honest. If you are exhausted and struggling because your child doesn’t sleep or hits you when they are angry, say so. This interview is the foundation of the goals they will set.

The Direct Observation

The BCBA will spend time interacting with your child. Mostly, this looks like play. They will sit on the floor, bring out some toys, and try to build rapport. They might test a few things out—like asking your child to put a toy away to see how they react to a demand, or briefly taking a preferred toy away to see how they handle frustration.

Throughout all of this, the BCBA will be taking notes on a laptop or clipboard. Again, this isn’t a grade. They are just collecting the baseline data they need.

What Happens Next?

After the FBA is over, the BCBA will take all their notes, your interview answers, and your child’s medical history, and they will write up a formal report. This report will include a Behavior Intervention Plan (BIP).

The BIP is basically the roadmap for your child’s therapy. It will outline exactly which behaviors they are going to work on decreasing, which positive skills they are going to work on teaching, and the exact strategies the therapists will use to get there. You will have a chance to review this plan, ask questions, and approve it before the actual day-to-day therapy sessions begin.

Preparing for an FBA might feel nerve-wracking, but it is truly just the first step in getting your child the support they need to thrive. Take a deep breath, be yourself, and know that you are doing a great job advocating for your family.