Repetitive Behaviors in Autism

Repetitive, purposeless behaviors are a common symptom of autism. In fact, many parents worry about autism when they see their child repetitively lining up toys, spinning objects, or opening and closing drawers or doors.

Repetitive behaviors can also involve saying, thinking about, or asking about the same thing over and over again.

In rare cases, repetitive behaviors can actually be dangerous; more often, though, they're a tool for self-calming. They can become a problem when they get in the way of ordinary activities or make it tough to get through school or work.

Autistic boy playing with toy cars
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"Stereotyped" Behaviors and Autism

Repetitive, apparently purposeless behaviors and obsessive, highly selective, and rigid interests are described as symptoms of autism in the DSM-5 (the official diagnostic manual).

Autism experts sometimes call these behaviors "stereotypy" or "perseveration." Different types of stereotypy and perseveration are present in other neurological conditions, as well.

According to the diagnostic criteria, being a "creature of habit" (preferring to follow a set schedule, for example) isn't enough to suggest autism; rather, the behaviors must be "abnormal in intensity or focus," and changes to those behaviors must cause "extreme distress."

According to the DSM, "Restricted, repetitive patterns of behavior, interests, or activities, as manifested by at least two of the following, currently or by history:

  • Stereotyped or repetitive motor movements, use of objects, or speech. Examples include simple motor stereotypes, lining up toys, flipping objects, echolalia, idiosyncratic phrases.
  • Insistence on sameness, inflexible adherence to routines, or ritualized patterns of verbal or nonverbal behavior. Examples include extreme distress at small changes, difficulty with transitions, rigid thinking patterns, greeting rituals, need for the same route or food every day.
  • Highly restricted, fixated interests that are abnormal in intensity or focus. Examples include strong attachment to or preoccupation with unusual objects, excessively circumscribed or perseverative interests.

What Stereotyped Behaviors Look Like

Repetitive behaviors in autism can vary radically from person to person. For some, it involves saying or talking about the same things over and over again.

This can include things like listing all of Marvel's Avengers and their powers, reciting scripts from TV, or asking the same question many times in a row).

For others, it involves physical actions such as repetitive rocking, flicking, or pacing. In more severe autism, stereotyped behaviors can be violent, like head-banging.

Some people on the autism spectrum engage in repetitive behaviors constantly, while others only occasionally perseverate when they're stressed, anxious, or upset.

Many people with autism feel very anxious when asked to change their routine or schedule. While changes can be annoying to someone who is not autistic, autistic reactions to change can be extreme.

When a person with autism is asked to change a routine, for example, the response can be overwhelming anxiety or anger, even if the person is very high functioning.

Sometimes, perseverative or stereotyped behaviors are obvious because they're so marked or unusual. Rocking back and forth for long periods, repetitively opening and closing doors, or reciting lines over and over are clearly unusual behaviors.

Often, however, autistic perseveration may not be obvious to the casual observer.

A person with autism may, for example, ask "Do you like Marvel movies?" If you say "yes," they may run through the same speech about Iron Man that they've been through ten times before, in exactly the same words, with exactly the same tone and gestures.

As a parent or close friend, you might know the speech backward and forward, but as a new friend, you may not know they've said it before.

Are Repetitive Behaviors a Problem?

These types of behaviors aren't unique to people with autism. Most people engage in some such behaviors. Common forms of perseveration include:

  • Nail biting
  • Pacing
  • Pencil or toe-tapping
  • Compulsive cleaning
  • A "need" to watch the same TV shows or sporting events without fail

For some people with autism, the problem of perseveration is really no problem at all, since it only arises at the same times as it would for other people—usually under stress—and the behaviors are fairly unobtrusive.

Perseveration can even be a plus for people with autism, since it may relate to a passionate interest that can lead to friendships or even careers. Someone with perseverative interest in computer games, for example, can join gaming clubs and find others with a similar passion.

For many people with autism, though, perseveration or repetitive behavior is not only disturbing to others but it's also a major roadblock to communication and engagement in the world.

A person who compulsively flicks his hands to the exclusion of anything else is clearly unable to attend to the world around them or take part in real-world activities.

And while there is nothing intrinsically wrong with talking about the same subject in the same way over and over again, such behavior can cause a variety of social and practical problems.

Causes and Treatments

No one really knows what causes perseveration in people with autism, though there are a variety of theories. The theory you espouse may cause you to select a particular treatment (or no treatment at all).

Of course, if a behavior is dangerous or risky, it must be changed. Some treatments have been more fully researched than others, but all have had some success with some individuals and less success with others.

If you believe perseveration is a behavioral issue, you're likely to use behavioral techniques (rewards and, in some cases, consequences) to "extinguish" the behavior.

If you believe repetitive behaviors are a self-calming technique used to block out too much sensory input, you're likely to use sensory integration techniques to help the person self-calm and regain a sense of control.

If you believe perseveration is a manifestation of real interests on the part of the person with autism, you are likely to use therapeutic techniques such as Floortime or SonRise to connect with them and help them turn perseverative actions into meaningful activities.

If you believe the perseverative behavior is caused by anxiety or a chemical or neurological issue, you are likely to attempt to control the behaviors through the use of medications.

A Word From Verywell

As a parent, you may be embarrassed or put off by your child's repetitive behaviors. Before taking action to "extinguish" them, however, it's important to understand the purpose they serve.

If they're helping your child stay calm, manage sensory challenges, or otherwise handle the demands of daily living, you'll need to support them as they modify or expand upon the routines.

That may mean finding a therapist to work with your child, or modifying your child's environment to make it less challenging.

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