What Are the 5 Main Symptoms of Autism?

Understanding autism spectrum disorder (ASD) starts with recognizing the signs. For parents and caregivers, knowing what to look for can be the first step toward early support, intervention, and hope. 

At Cardinal Pediatric Therapies, we specialize in helping children develop communication, social, and daily living skills through customized ABA therapy in Arizona and North Carolina.

If you’ve ever asked, “What are the 5 Main Symptoms of Autism?”, you’re not alone. This article will walk you through the most common early signs of autism in children when to seek an evaluation, and how our team can help your child thrive.

What Are the 5 Main Symptoms of Autism

The 5 Main Symptoms of Autism

While symptoms can vary, experts typically point to five key areas where children with autism show noticeable differences.

1. Communication Difficulties

Children with autism often struggle to communicate in typical ways. This can include:

  • Delayed speech development
  • Limited use of gestures, such as pointing or waving
  • Lack of response to their name
  • Difficulty holding a conversation or understanding social language

Some children may develop language but struggle with using it in context. Others might repeat the exact phrases (echolalia) without understanding their meaning. 

At Cardinal Pediatric Therapies, our speech therapy and ABA programs are designed to help children develop both expressive and receptive language skills.

2. Social Challenges

A hallmark symptom of autism is difficulty with social interactions. Children may:

  • Avoid eye contact
  • Shows little interest in playing with peers
  • Prefer to play alone or in parallel to others rather than cooperatively
  • Struggle to read social cues, such as facial expressions or tone of voice

Social skill development is a core part of our in-clinic ABA therapy and classroom readiness programs, where children can learn how to build friendships and participate in group settings.

3. Repetitive Behaviors

Repetitive movements or behaviors, also known as “stimming,” are common in autism. These might include:

  • Hand-flapping, rocking, or spinning
  • Repeating words, sounds, or phrases
  • Lining up toys or objects in specific ways
  • Insisting on specific routines or rituals

While stimming can serve a calming purpose for children, ABA therapy helps ensure these behaviors don’t interfere with learning or social engagement. 

Our Registered Behavior Technicians (RBTs) work one-on-one with children to identify the reasons behind repetitive behaviors and provide healthier alternatives when needed.

4. Restricted Interests

Children with autism often have intense interests in specific topics, objects, or activities. For example, a child may:

  • Talk obsessively about trains or dinosaurs
  • Memorize maps, numbers, or scripts
  • Focus exclusively on one toy or type of play

These focused interests can be a strength, but they can also create barriers to flexible thinking and participation in group learning. 

Cardinal’s ABA therapy programs help children expand their range of play and develop broader learning skills.

5. Sensory Sensitivities

Many children with autism have unusual responses to sensory input. This can involve:

  • Avoiding certain sounds, lights, or textures
  • Overreacting to touch or noise
  • Seeking out sensory experiences like spinning or crashing into things

Cardinal Pediatric Therapies incorporates sensory integration strategies in both in-home and in-clinic settings, enabling children to manage their sensitivities and enhance emotional regulation.

When to Seek an Autism Evaluation

When to Seek an Autism Evaluation

Recognizing the 5 main symptoms of autism early can lead to timely support. If your child consistently shows signs in communication, social interaction, or behavior, it’s time to speak with a specialist.

At Cardinal Pediatric Therapies, we offer comprehensive autism diagnosis and evaluation services utilizing gold-standard tools, including the ADOS-2 and ADI-R. 

With locations in North Carolina and Arizona, our experienced team guides families through every step, from screening and assessment to individualized treatment planning.

How ABA Therapy Helps Address Autism Symptoms

ABA therapy is considered the gold standard in autism treatment. It uses evidence-based techniques to reinforce positive behaviors and reduce challenging ones. At Cardinal, we provide:

  • In-home ABA therapy: Delivered in a child’s natural environment for comfort and consistency
  • In-clinic ABA therapy: Structured and social, ideal for developing classroom readiness
  • Parent coaching: Empowers families to support their child’s progress at home
  • Group family coaching: Builds connection and strategy-sharing among caregivers

Each child’s therapy plan is tailored to their strengths, challenges, and goals. Whether your child needs help with language, behavior, or daily routines, Cardinal offers compassionate, customized care.

Why Families Trust Cardinal Pediatric Therapies

Cardinal Pediatric Therapies is known for delivering exceptional ABA therapy and support for families navigating autism. Here’s what sets us apart:

  • Multidisciplinary teams of BCBAs, RBTs, speech-language pathologists, and occupational therapists
  • Personalized care that adapts as your child grows
  • Convenient in-home options and welcoming clinics
  • Collaborative programs like classroom readiness and parent training
  • Strong community partnerships with pediatricians, schools, and specialists

Whether you’re just beginning to explore a diagnosis or looking for the right therapy partner, we’re here to support your child’s development at every stage.

Why Families Trust Cardinal Pediatric Therapies

Frequently Asked Questions (FAQs)

What are the 5 most common signs of autism in toddlers?

The five most common signs include communication delays, limited eye contact, repetitive behaviors, intense fixations, and unusual reactions to sensory input.

Can autism symptoms appear suddenly?

Autism symptoms typically emerge gradually, but some parents report noticing a sudden loss of language or social interest between 18 and 24 months.

How do I know if my child needs an autism evaluation?

If your child isn’t meeting developmental milestones or shows signs like delayed speech, social withdrawal, or repetitive movements, consult a pediatrician or autism specialist for evaluation.

What type of therapy is most effective for treating autism symptoms?

ABA therapy is one of the most effective evidence-based treatments for autism. It helps children develop communication, social, and adaptive living skills.

Can ABA therapy help with all autism symptoms?

Yes, ABA can be tailored to address a wide range of symptoms, including behavioral challenges, language delays, classroom readiness, and sensory integration.

Final Thoughts

Understanding the five main symptoms of Autism is a decisive first step toward supporting your child’s future. At Cardinal Pediatric Therapies, we’re committed to walking with you through every stage, from early concerns to personalized therapy and long-term success.

About the Author

Chief of Staff

Dr. Mike Henderson, Ph.D., BCBA-D, LBA

Regional Operations Director

North Carolina

Mike Henderson, PhD, LBA, BCBA-D, is the Regional Operations Director at Cardinal Pediatric Therapies. With over two decades of experience in behavior analysis and organizational leadership, he focuses on mentoring teams and fostering a culture of collaboration, growth, and excellence in client care. Mike believes strong leadership and supportive systems are essential for helping clients, families, and providers succeed together.

Felicia Freeman

Clinic Manager

I am Felicia Freeman, the Clinic Manager for Cardinal Pediatric Therapies. I have been in ABA for several years now and am passionate about the community that we serve. I started out as an RBT, decided to go the administrative route, and worked my way up to managing clinics. I choose this field every day because I enjoy making a meaningful impact in the lives of our clients and building strong teams that change lives.

Amanda Dean, MA, BCBA, LBA

Johnston County, NC

Amanda graduated from The Chicago School of Professional Psychology in 2018 with her Masters in Psychology. She proceeded to complete her graduate certificate in ABA and became a BCBA in November 2020. Amanda has a passion for behavior reduction, tolerance training and functional communication training. She enjoys spending as much time as she can with her 3 children and husband. When she’s not working, Amanda is very involved in her local Pop Warner Cheerleading program where she is the Assistant Cheer Director and a head coach.

Becky Fronheiser

Operations Director

Arizona

Becky has worked in behavioral health for 7 years. She joined Cardinal in the spring of 2024.  Becky is grateful for the opportunity to work with such a passionate group of people and looks forward to supporting families with their specific ABA needs.  In her personal time, she enjoys spending quality time with her husband, 6 kids and 4 grandkids and loves to travel and relax on the beach.

Matthew Wilkinson

Operations Director

Cary, NC

Matthew holds a bachelors degree from the University of Utah, Medical Degree from the Autonomous University of Guadalajara and an MBA from Western Governors University. He has worked in the pediatric field for the majority of his professional life and has a passion for helping bring the best care to children in need. He enjoys spending time with his wife and three children and day trips to the coast.

 

Trisha Iannotta Bieszczad, PsyD., BCBA

Triad, NC

Trisha is a Board Certified Behavior Analyst (BCBA) with extensive expertise since 2016 in applying behavior analytic principles to improve the lives of children and adolescents. Her professional journey began with a doctoral degree in clinical psychology, emphasizing child and adolescent development. This foundation has equipped her with a deep understanding of psychological theories and practices, which she seamlessly integrates into her work as a BCBA. Outside of her professional endeavors, Trisha enjoys reading, spending time outdoors with her family & trying out new restaurants. Trisha’s dedication to both her career and personal interests reflects her commitment to continual growth and enrichment, both professionally and personally. Her multifaceted background allows her to approach each aspect of her life with a blend of expertise, enthusiasm, and a genuine appreciation for learning and exploration.

Tina Lee

Director of Finance

Tina Lee is the Finance Director for Cardinal with a variety of experience in the Healthcare Industry for over 13 years. She is compassionate and always eager to assist where she can. In the ever-changing Healthcare environment, Tina has played a vital role in putting processes in place to obtain high efficiency outcomes to help our clients get the care they need. Tina enjoys the outdoors and loves spending time with her family.

William Evans

Director of Outreach and Recruitment

William is a UNCW Graduate who started his professional career working in Marketing and Recruiting for a local technology company before looking for an opportunity to take those skills and help others. In his spare time he plays hockey, including annually for the North Carolina Autism Hockey Tournament, which is dedicated to the raising money and awareness for organizations helping local families with children diagnosed with autism.

Alice Okamoto, MA, BCBA, LBA

Chief of Staff

Alice has been with Cardinal for over 4 years and has worn many hats along the way!  Alice has a passion for working with clients and families as a unit, supervising behavior analyst trainees, and collaborating on strategic initiatives to ensure clinical efficiencies.  Alice‘s professional experience began with ABA in a school setting, and has worked in schools, homes, and clinics throughout the years while enjoying collaboration with related providers.  In her free time, Alice enjoys traveling, exploring parks with her dog, Oliver, and trying new restaurants. 

Darrin Miller

CEO

Darrin has dedicated his education and career to the field of behavioral health. As a licensed therapist and master’s in clinical counseling he works to create solutions that improve the lives of those impacted by Autism Spectrum Disorder at a local, state, and national level. He strives to create a culture of caring and empathy while innovating solutions for improving families’ access to quality care as quickly as possible.