What Is Autism Spectrum Disorder? Signs, Traits & Myths Explained

The Spark Learning Blog • Posted by Alix Naginski, MSc, RBT on September 18, 2025

Understanding the Autism Journey

The truth is that every child with autism writes their own story, and for the families, that journey is filled with unique challenges, perspectives, but also with moments of incredible growth. For parents and loved ones, the initial diagnosis can feel like stepping into an unknown world—a mix of questions, emotions, and a desire to understand. The word “autism” can bring up many questions: What does it really mean? How does it look day-to-day? Most importantly, families want to know how they can best support their loved one. 

Autism is an individual way of perceiving and receiving the world. Those who know or have cared for children on the spectrum often say, “When you know one child with autism, you know one child with autism.” Every individual with this diagnosis has their own personality, bringing a distinct set of strengths and challenges. Understanding that is the first key step to supporting them in a meaningful way.

Defining Autism

Autism spectrum disorder (ASD) is a neurodevelopmental condition that manifests itself through restricted and repetitive behaviors/ interests and deficits in social-communication (American Psychiatric Association, 2013). The reference to a “spectrum” is essential because it encompasses varying degrees of deficits and a wide range of traits and abilities—meaning that no two individuals with autism are exactly alike. Consequently, what could be a mild difference in one person could present more noticeable challenges in another.

Another important aspect is that autism isn’t a static diagnosis—it evolves over time and over the child’s development. What a child struggles with early on might change as they grow, develop new skills, or find support that works for them. That’s why understanding the spectrum and being flexible in treatment and support over time is crucial. 

Common Traits and Behaviors

Communication challenges are common but vary widely in their expression. This can manifest itself with issues such as social and emotional reciprocity, having back-and-forth conversations or ability to share interests. Some of the nonverbal deficits include having a hard time using appropriate gestures, body language, facial expressions and so on. And more broadly, understanding, developing, and maintaining relationships as a whole can be challenging for those on the spectrum (Olney, 2000). 

From a technical diagnosis perspective, a person with autism must present at least two restricted and repetitive behaviors and interests. These may include repetitive motor movements, vocal stereotypy or echolalia, rigidity with routines and “special interests” (Berry et al, 2018). The latter is manifested by children having an intense focus on certain topics or objects. We may also find some of those with ASD to have particular sensitivities to specific sounds or visual stimuli.

Both of these characteristics of autism can be interrelated and often overlap. For example, sensory sensitivities in social contexts may result in difficulty creating and maintaining relationships with others. Nevertheless, understanding the special interests or difficulties a child with autism faces on a day-to-day basis is critical to implementing the support needed to improve their social connectivity and integration. 

Myths and Misconceptions

Autism continues to be plagued by certain myths and misconceptions that in many cases cause parents to blame themselves for their child’s diagnosis. However, this is simply not the case. Autism stems from neurological developmental differences, meaning that its root cause has yet to be determined.

These are a few examples of what some in the past have believed to be the reason behind the development of autism, all of which have been invalidated:  

Vaccinations: According to the Centers for Disease Control and Prevention (CDC), extensive research has shown no link between vaccines and autism (Davidson, 2017).
Bad parenting: Autism is a neurodevelopmental condition, not a result of deficient parenting or particular parenting style.
Behavioral issues: Children with autism are not badly behaved. Rather, their challenging behaviors are ways of coping or communicating. Their inability to express or communicate their feelings can often result in outbursts that to the untrained eye resemble “badly behaved children”.

What do we know for sure?

It is now accepted that genetics play a significant role in autism, with many studies suggesting that there is a hereditary component (Persico & Napolioni, 2013). Newer research also indicates that parents on the spectrum are more likely to have children with autism themselves. Some studies point to biological factors such as the microbiome—the bacteria and microorganisms in our bodies—and how those might influence neurodevelopment in the womb (Hirai et al, 2024).

Due to ASD being a neurological difference there is no “cure” for it. Various treatments and interventions, such as Applied Behavior Analysis, however can help children on the spectrum to better manage their symptoms and improve quality of life. Tailoring treatment that starts at an early age can and does increase the child’s independence and ability to learn. Moreover, creating routines at home and seeking professional guidance through Parent Training to best support those with autism is key. 

Autism is a mosaic of traits, challenges, and also of strengths. Every child’s journey is different, and understanding this spectrum helps us provide better support, empathy, and acceptance. Our goal is to celebrate the individual and foster a world where everyone on the spectrum is understood and valued. Remember, whether your loved one is navigating social skills, sensory sensitivities, or simply expressing themselves in their own way, your support and understanding make all the difference. 

Stay tuned for more insights on how to support, connect with, and celebrate children on the spectrum in our upcoming blogs!

Resources

American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). https://doi.org/10.1176/appi.books.9780890425596. 
Berry, K., Russell, K., & Frost, K. (2018). Restricted and repetitive behaviors in autism spectrum disorder: A review of associated features and presentation across clinical populations. Current Developmental Disorders Reports, 5(2), 108-115.
Davidson, M. (2017). Vaccination as a cause of autism—myths and controversies. Dialogues in Clinical Neuroscience, 19(4), 403–407. https://doi.org/10.31887/DCNS.2017.19.4/mdavidson
Hirai T, Umeda N, Harada T, Okumura A, Nakayasu C, Ohto-Nakanishi T, Tsuchiya KJ, Nishimura T, Matsuzaki H. Arachidonic acid-derived dihydroxy fatty acids in neonatal cord blood relate symptoms of autism spectrum disorders and social adaptive functioning: Hamamatsu Birth Cohort for Mothers and Children (HBC Study). Psychiatry Clin Neurosci. 2024 Sep;78(9):546-557. doi: 10.1111/pcn.13710. Epub 2024 Jul 23. PMID: 39041066; PMCID: PMC11488600.
Olney, M. F. (2000). Working with autism and other social-communication disorders. Journal of Rehabilitation-Washington-, 66(4), 51-56.
Persico, A. M., & Napolioni, V. (2013). Autism genetics. Behavioural brain research, 251, 95-112.

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