If your child receives ABA therapy, you may have heard your BCBA say, “We need to teach a replacement behavior.”
But what does that actually mean?
When we talk about replacement behaviors in ABA, we are not simply trying to get a child to stop doing something. We are teaching them a new skill that helps them communicate or meet the same need in a safer and more appropriate way.
As a BCBA, I think this is one of the most important concepts for families to understand because behavior almost always serves a purpose.
Behavior Is Communication
Imagine a child who screams every time they want a break from an activity. We could focus only on stopping the screaming, but that does not teach the child what to do instead.
The screaming may be their current way of communicating, “I need a break.”
Our job is to recognize that message and teach a more effective way to communicate it. Depending on the child, that could mean saying “break,” signing for a break, handing someone a break card, or selecting “break” on a communication device.
The goal is not simply less screaming. The goal is for the child to have a better way to communicate what they need.
That new skill is the replacement behavior.
Replacement Behaviors Should Meet the Same Need
This is where replacement behaviors can sometimes be misunderstood.
We cannot choose a random behavior that looks better and expect it to replace a challenging behavior. The new skill needs to help the child accomplish the same thing the original behavior was accomplishing.
For example, if a child throws a toy because they are finished playing, teaching them to sit quietly does not necessarily solve the problem. Instead, we may teach them to say “all done,” place the toy in a finished bin, or use another form of communication to let us know they are finished.
If a child hits someone to gain access to a favorite toy, we might teach them to request the toy, ask for a turn, or wait appropriately.
Understanding why a behavior is happening helps us determine what skill we need to teach.
We Have to Teach the New Skill
Children do not automatically know what to do just because we tell them what not to do.
Think about how often we hear phrases like:
“Stop yelling.”
“Don’t hit.”
“Don’t throw that.”
Those statements tell a child what we do not want, but they do not always tell them what they should do instead.
In ABA, we want to spend just as much time teaching the “do” as we spend responding to the “don’t.”
Instead of only saying, “Don’t hit,” we can teach, “Tap my arm if you need my attention.”
Instead of only saying, “Stop yelling,” we can teach, “Tell me you need help.”
That gives the child a skill they can actually use the next time they are in the same situation.
The Replacement Has to Work
Here’s another important piece. If the challenging behavior works faster or more consistently than the new skill, your child may continue using the challenging behavior.
Imagine being taught to say “break,” but every time you ask for one, you’re told no. Meanwhile, screaming immediately gets the activity removed. Which behavior are you more likely to use next time?
This is why teaching replacement behaviors requires consistency from everyone involved.
At first, we want the new behavior to be worth using. As the child becomes more successful, we can gradually work on additional skills such as waiting, tolerating “no,” being flexible, or completing a little more of an activity before taking a break.
We meet the child where they are and build from there.
What Can Parents Do at Home?
You do not need to turn your home into a therapy session. Instead, look for natural opportunities to help your child communicate what they need.
If you notice a challenging behavior, ask yourself, “What might my child be trying to communicate or accomplish right now?”
Then think about what you would like them to do instead.
Your BCBA can help you identify appropriate replacement skills and practice how to respond consistently at home. This is also a great topic to bring to Family Guidance Training because what works for one child may not work for another.
Final Thoughts
Replacement behaviors are not about making a child appear more compliant or simply eliminating behaviors that adults find difficult.
They are about giving children better tools.
When we understand why a behavior is happening, we can teach communication, coping, independence, and other meaningful skills that help the child navigate those situations more successfully.
At Essential Speech and ABA Therapy, our goal is not just to reduce challenging behavior. We want children to leave therapy with skills they can use at home, at school, in the community, and throughout their lives.
Sometimes the most meaningful question we can ask is not, “How do we stop this behavior?”
It is, “What can we teach instead?”
