Skip to main content

Typical toddler behavior or autism? Key differences

ASD symptoms can mimic the normal developmental variations of toddlers

Toddler with therapist
Krakenimages.com / Shutterstock

Autism spectrum disorder, or ASD, is an umbrella term for a group of neurological and developmental disorders that cause problems in communication, social interaction, and intellectual development, among other areas. According to the National Autism Association, ASD affects 1 in 44 children in the United States. Although every ASD diagnosis is different, most cases are identified before a child’s third birthday. It’s a lifelong condition with no cure, so receiving an Autism diagnosis can be scary for a toddler’s parents and caretakers to receive.

ASD has many well-established warning signs for toddlers, including slower-than-average speech development. The challenge arises because these behaviors often have any number of possible causes, some of which are not medically out of the ordinary.

Recommended Videos

How do parents of toddlers know when to be concerned about autism spectrum disorder and when to chalk it up to normal variation? We have more information on how to tell the differences, but as always, talk to your pediatrician if you have questions about your toddler’s behavior. There is no substitute for a doctor’s assessment of your child and their unique needs.

Toddler boy walking around.
Prostock-studio / Shutterstock

ASD: A quick overview for parents of toddlers

ASD’s prevalence is on the rise. An analysis earlier this year in Autism Research found that 100 of every 10,000 children around the world have an ASD diagnosis, which is up from 62 out of every 10,000 just a decade ago. Autism is four times more common in boys than girls. About 40% of children with ASD don’t speak and half have a borderline or full-blown learning disability.

Although there’s no cure for ASD, symptoms can improve over time, especially with early intervention and treatment. If you believe your child may have ASD, talk to your pediatrician or the pediatric department of your local hospital. If needed, they can put you in touch with ASD care and support services designed specifically for very young children and their families.

Toddler boy playing
Rawpixel.com / Shutterstock

Autism or typical? How to tell in toddlers

According to the American Academy of Pediatrics  (APA), speech and developmental delays are exceedingly common, with language delays — the most common form of developmental delays  — affecting one out of every five children in the U.S. They’re often nothing to worry about, but in some cases, they could indicate the presence of ASD in your toddler.

The APA has identified some of the most frequent signs that your toddler may be outside the typical spectrum and could be autistic. If your child is displaying any of these behaviors, it might be a good idea to bring your pediatrician into the conversation.

  • Not using single words by 15 months or two-word phrases by 24 months.
  • Language skills may regress (get worse) between 15 and 24 months.
  • Shows little or no interest in communicating.
  • Less likely to point at things they need.
  • Parroting words or phrases without understanding their meaning.
  • Doesn’t respond when someone calls their name but responds normally to other sounds.
  • Rocks, spins, sways, walks on toes, flaps hands, or performs repetitive tasks.
  • Has difficulty transitioning from one activity to another.
  • May be very sensitive or insensitive to lights, sounds, smells, touch, and other sensory stimuli.
A mother helping her toddler play with a wall activity.
mmpile / Getty Images

What to do if you have concerns

It can be easy for parents to ring the alarm bell when they notice their child exhibiting certain characteristics or traits that may be often associated with autism. It’s important to remember that just because your baby or toddler has exhibited some signs of autism that doesn’t necessarily mean they have ASD. However, if you are concerned that your toddler may have autism it’s important to reach out to your pediatrician to have them properly evaluated. They will use screening tools to determine if your child has ASD, and if so, help you determine the interventions necessary to help your child.

It’s a parent’s job to worry, but when it comes to autism, moms, dads, and other caretakers can be on the lookout for warning signs without becoming overly concerned. Keep an eye on it and trust your instincts. Toddlers and other very young children develop along widely different trajectories. Understanding what’s considered normal for the age and what might be a sign of ASD will help put unneeded fears to rest while helping you react more quickly and efficiently when something of real concern arises.

Scott Harris
Scott Harris is a freelance writer based near Washington, DC, with more than a decade of experience covering health…
Are the terrible twos really that terrible?
The terrible twos are coming — are you prepared? How did toddlers get the bad reputation?
Upset girl toddler

Whether you're a parent or not you've probably heard about the terrible twos. It's the one stage of development many fear and dread simply because of its reputation. But, are 2-year-olds really that "terrible," and has this stage of development earned its bad reputation? Let's break down why 2-year-olds get such a bad rap and you can decide if the terrible twos are really that terrible.
The terrible twos

The terrible twos are a stage of development for young children that typically happens from 18 months of age through 30 months. Tantrums or meltdowns, defiance, and frustration usually characterize the terrible twos. The tantrums and meltdowns often occur because toddlers are frustrated. This developmental stage between 1 and 3 is a big one. Toddlers are growing both intellectually, physically, and emotionally. There is a lot to take in. Since toddlers' language skills are developing, too, they don't have the communication skills to express how they're feeling.

Read more
Are you a helicopter mom? Here’s how to tell and what to do about it
Is being a helicopter parent so bad? Here's how to tell if you're too overbearing
Mom encouraging baby to crawl

Parents are facing parenting challenges that older generations never had to endure and are facing constant scrutiny online and in person.  It seems that no matter how you parent, someone on the internet will have something to say about it, especially if you're a mom. For some reason, dads don't face nearly as much judgment about how they raise their kids as mothers do. After all, terms like silky mom, tiger mom, and crunchy mom, are now common terms used to describe different parenting methods, but the helicopter mom is the OG of these parenting styles.

What is helicopter parenting?

Read more
This is when kids start and stop losing baby teeth
A complete guide to toddler teething
Toddler with teeth missing

One of the most exciting parts of being a parent is when your child's first tooth (or sometimes teeth) breaks through! Not only does this give your little one some relief from painful teething, but it's exciting to watch your child as they grow and develop. Like most milestones, when kids start and stop losing baby teeth really depends on the child, but there are some general guidelines parents can be aware of.

Here is a breakdown of when both the eruption and loss of baby teeth typically occur, as well as answers to common concerns you may have, and what you need to know to soothe your kids during this process.
Baby teeth chart

Read more