Signs of Autism: What Parents Should Look For

You know your child better than anyone else.

Sometimes parents notice little things that make them pause and wonder. Maybe their child isn’t talking as much as other children their age. Maybe they seem more interested in playing alone, have intense reactions to changes in routine, or become overwhelmed by sounds, textures, or crowded places.

For some families, these differences become noticeable during infancy or toddlerhood. For others, concerns don’t arise until preschool or even later.

If you’ve found yourself searching online for answers, you’re not alone. Many parents begin exploring autism after noticing developmental differences and wondering whether they should seek an evaluation.

As a Board Certified Behavior Analyst (BCBA), I work with many autistic children and their families. One important thing to know is that BCBAs do not diagnose autism. Autism diagnoses are typically made by qualified medical professionals such as developmental pediatricians, psychologists, neurologists, or other clinicians trained in autism assessment.

The purpose of this post is not to help you diagnose your child. Instead, it’s designed to help you understand some of the common signs associated with autism and when it may be appropriate to discuss concerns with your child’s healthcare provider.

Social Communication Differences

One of the hallmark characteristics of autism involves differences in social communication.

Communication is much more than talking. It also includes gestures, facial expressions, eye contact, body language, and social interaction.

Some signs may include:

Not Consistently Responding to Their Name

Most young children will look toward a parent or caregiver when their name is called.

A child with autism may:

• Not consistently turn when their name is called
• Seem unaware that someone is speaking to them
• Respond more readily to preferred sounds than to their name

It’s important to remember that hearing concerns should always be ruled out by a healthcare professional.

Delayed Speech and Language Development

Some autistic children begin speaking later than expected, while others may develop speech on time but use language differently.

Parents may notice:

• Few or no words by expected developmental milestones
• Difficulty asking for wants and needs
• Repeating words or phrases they have heard before
• Limited use of gestures such as pointing or waving
• Difficulty answering questions

Not all autistic children have speech delays. Some develop advanced vocabularies but may struggle with social communication skills.

Difficulty Sharing Interests with Others

Young children naturally seek to share experiences with the people around them.

For example, a toddler may point to an airplane in the sky or show a favorite toy to a parent.

Some autistic children may be less likely to:

• Point things out to others
• Show objects to share enjoyment
• Seek attention for things they find interesting
• Engage in back-and-forth social interaction

Differences in Eye Contact

Eye contact varies widely among all children.

Some autistic children may:

• Make less eye contact than expected
• Briefly glance rather than sustain eye contact
• Use eye contact differently during social interactions

It’s important to understand that eye contact alone is never enough to determine whether a child is autistic.

Play Differences

Play is one of the primary ways children learn about the world.

Many autistic children enjoy playing but may play differently than their peers.

Examples may include:

Limited Pretend Play

Children often engage in imaginative play, such as:

• Pretending to cook food
• Feeding a baby doll
• Playing house
• Acting out stories

Some autistic children may show less interest in pretend play or may need more support learning these skills.

Playing with Parts of Toys

Instead of using toys as intended, a child may:

• Spin the wheels of toy cars
• Open and close doors repeatedly
• Focus on specific parts of a toy

This does not automatically indicate autism, but it can be one characteristic professionals consider during an evaluation.

Preferring Solitary Play

Some autistic children may:

• Prefer playing alone
• Have difficulty joining group activities
• Show less interest in peer interactions

Many autistic children enjoy being around others but may need support developing social skills and understanding social expectations.

Repetitive Behaviors

Another common characteristic of autism is repetitive behavior.

These behaviors may help a child regulate emotions, express excitement, or meet sensory needs.

Examples include:

• Hand flapping
• Rocking
• Spinning
• Jumping repeatedly
• Repeating sounds or words
• Pacing
• Lining up objects

These behaviors are often referred to as “stimming,” which is short for self-stimulatory behavior.

Many autistic children and adults describe stimming as calming, enjoyable, or helpful.

Strong Interests and Routines

Many autistic children develop strong interests in specific topics or activities.

Examples may include:

• Dinosaurs
• Trains
• Weather
• Maps
• Numbers
• Specific television shows

A child may enjoy learning extensive information about a favorite topic and prefer talking about it frequently.

Many autistic children also thrive on routine and predictability.

Parents may notice:

• Difficulty with unexpected changes
• Strong preferences for specific routines
• Wanting things done in a particular order
• Becoming upset when plans change

Routine often helps children feel safe and understand what to expect.

Sensory Differences

Many autistic individuals experience the world differently through their senses.

Some children may be highly sensitive to sensory input, while others actively seek it out.

Sensory Sensitivities

A child may:

• Cover their ears during loud sounds
• Become distressed by vacuum cleaners or hand dryers
• Refuse certain foods because of texture
• Dislike tags, seams, or specific clothing fabrics
• Become overwhelmed in busy environments

Sensory Seeking Behaviors

A child may:

• Spin frequently
• Jump or crash into furniture
• Seek tight hugs or deep pressure
• Touch objects repeatedly
• Enjoy swinging or movement activities

These sensory differences can affect everyday activities at home, school, and in the community.

What Should Parents Do If They Have Concerns?

If you notice several of these signs and have concerns about your child’s development, start by talking with your pediatrician.

You can also discuss concerns with:

• A developmental pediatrician
• A psychologist
• A speech-language pathologist
• An early intervention provider

The goal is not to rush to a diagnosis. The goal is to gather information and determine whether additional evaluation or support may be beneficial.

Trust your instincts. Parents are often the first people to recognize developmental differences.

Why Early Identification Matters

Research has consistently shown that early intervention can help children develop communication, social, learning, and daily living skills.

Early support may include:

• Speech therapy
• Occupational therapy
• Behavioral services
• Parent coaching
• Early childhood special education services

The earlier a child receives appropriate support, the more opportunities they have to build skills that promote independence and quality of life.

Final Thoughts

Every child develops differently.

Some children who display a few of the characteristics discussed in this article may not be autistic. Others may show only subtle signs and still receive an autism diagnosis.

Autism is identified by looking at patterns of development across communication, social interaction, behavior, and sensory experiences—not by any single characteristic.

If you have concerns, don’t ignore them. Asking questions and seeking professional guidance can provide valuable information and peace of mind.

Most importantly, remember that a diagnosis does not change who your child is. It simply helps families better understand how their child learns, communicates, and experiences the world so they can access the support that best meets their needs.