Understanding Behavior in Autistic Students
When an autistic student hits, runs, shouts, or shuts down, it is easy to see only the behavior. This module helps you look underneath it. Behavior almost always meets a need, and once you know the need, you can choose supports that actually help.
The module has two parts. Each part has a short reading followed by practice activities built around real classroom moments. Work through the sections in order; your progress is saved as you go. Plan on about 30 minutes, including the video.
- Explain why behavior is a form of communication
- Describe a behavior so anyone could see and count it
- Use the ABC pattern to look at what happens before and after
- Name the four common functions of behavior
- Tell a meltdown from goal-directed behavior
Watch first: Understanding Behavior in Autistic Students (8 min)
Watch the overview, then work through the readings and activities below.
What Behavior Is Telling You
Autistic students face demands that other students may barely notice: noisy rooms, unexpected changes, unwritten social rules, and directions given only out loud. Many also have communication differences. Some speak fluently, some use augmentative and alternative communication (AAC), and some lose access to words when they are stressed. When a need can’t be expressed another way, behavior often becomes the message.
To understand that message, start with a clear description. Describe the behavior so that anyone could see and count it: tears up the worksheet or leaves the classroom without permission, not is defiant or has an attitude. Then look at the ABC pattern: the antecedent (what happens right before), the behavior, and the consequence (what happens right after). A consequence is simply what follows. It is not the same as a punishment.
Read the definition of functional behavioral assessment (FBA) in the National Clearinghouse on Autism Evidence and Practice report. Notice that FBA is itself listed as an evidence-based practice, and that it starts with exactly the kind of information teachers see every day.
Open the NCAEP report →- Why behavior is a form of communication
- How to describe behavior objectively
- The parts of the ABC pattern
- Why FBA is an evidence-based practice
Seeing the Need Behind the Behavior
Keep these ideas in mind the next time a behavior surprises you.
Stress often builds first.
Covering ears, pacing, repeating questions, more stimming, or going quiet can all signal rising stress before a behavior happens.
Stimming is not the problem.
Rocking, hand flapping, or humming often help a student regulate. A sudden increase can be a sign that stress is building.
Echolalia can carry meaning.
A student who repeats “Do you want a break?” may be asking for one.
Words come before labels.
“Defiant” and “manipulative” describe a judgment, not a behavior. “Put head down and didn’t start the task” describes what happened.
Noah, an autistic second grader, has a hard morning. Your paraprofessional writes in the log: “Noah was defiant and had a bad attitude during reading.”
The case manager asks for information she can use to understand what’s happening.
The case manager asks you to keep notes on Noah for the next two weeks.
What else should each note include?
Which description of a behavior is written in observable terms?
Reveal the Best Answer
For each statement, choose Accurate or Inaccurate, then check your answers.
1. A consequence, in the ABC pattern, means a punishment the student receives.
2. Students who usually speak well may lose access to words when they are stressed.
3. Functional behavioral assessment is one of the evidence-based practices identified by NCAEP.
4. A sudden increase in stimming can be a sign that stress is building.
Why the Behavior Keeps Happening
When you look at ABC patterns over time, most behavior serves one of four functions. Escape gets the student away from a task, demand, or setting. Attention gets a reaction from adults or peers, even a negative one. Access gets an item or activity. Sensory means the behavior itself feels good or relieves discomfort. The same behavior can serve different functions for different students, so the support has to match the function, not the behavior’s appearance.
Not every hard moment is goal-directed. A meltdown is a response to overwhelm from sensory overload, stress, or too many demands. The student loses control, and the behavior isn’t aimed at getting anything. A shutdown is similar, but the student withdraws or stops responding. These call for calm, safety, and lowered demands, which you will learn about in Module 4.
When behavior impedes a student’s learning or the learning of others, federal rules require the IEP team to consider positive behavioral interventions and supports. Read the special factors in 34 C.F.R. § 300.324(a)(2). Your ABC notes are often where this work begins.
Open 34 C.F.R. § 300.324 →- The four common functions of behavior
- How meltdowns differ from goal-directed behavior
- When the IEP team must consider behavior supports
- How teacher data feeds an FBA
Questions That Reveal Function
Ask these questions about any behavior that keeps happening.
When does it happen most?
Look for activities, times, places, or people that show up again and again.
When does it almost never happen?
Times when the behavior is absent show what is already working.
What happens right after?
Does the student get out of work, get attention, or get something they want?
What might the student be telling me?
Shift from “Why is this student acting out?” to “What does this student need?”
Andre, an autistic sixth grader, hums loudly during independent reading. Classmates complain. You notice that he hums whether the room is quiet or noisy, whether he is alone or with peers, and whether or not anyone responds.
Telling him to stop works for about a minute.
You offer Andre noise-reducing headphones with soft music and a chewy necklace. Humming drops a lot, but not completely.
What should you do next?
Which situation best describes a meltdown?
Reveal the Best Answer
For each statement, choose Accurate or Inaccurate, then check your answers.
1. The same behavior always serves the same function for every student.
2. A meltdown is a response to overwhelm, not an attempt to get something.
3. When behavior impedes learning, the IEP team must consider positive behavioral interventions and supports.
4. One incident is usually enough to identify the function of a behavior.
What to carry into Module 2
- Behavior communicates a need.
- Describe behavior so anyone could see and count it.
- Use the ABC pattern to look at what happens before and after.
- Most behavior serves escape, attention, access, or sensory functions.
- Meltdowns come from overwhelm, not from trying to get something.
References
- Development, review, and revision of IEP, 34 C.F.R. § 300.324. https://www.ecfr.gov/current/title-34/section-300.324
- Steinbrenner, J. R., Hume, K., Odom, S. L., Morin, K. L., Nowell, S. W., Tomaszewski, B., Szendrey, S., McIntyre, N. S., Yücesoy-Özkan, S., & Savage, M. N. (2020). Evidence-based practices for children, youth, and young adults with autism. The University of North Carolina at Chapel Hill, Frank Porter Graham Child Development Institute, National Clearinghouse on Autism Evidence and Practice Review Team. https://ncaep.fpg.unc.edu/wp-content/uploads/EBP-Report-2020.pdf
- Vanderbilt Kennedy Center. (2025). Evidence-based practices for autistic students (for educators) [Tip sheet]. https://tipsheets.vkcsites.org/evidence-based-practices-for-autistic-students-for-educators/