Understanding the Signs of Autism in Children: A Parent's Guide

Autism Spectrum Disorder (ASD) affects communication and behavior in ways that can often leave parents feeling uncertain and overwhelmed. While each child’s path is different, recognizing the early signs of autism is an important first step toward getting the right support.

What are the signs of autism in children?

Common signs include differences in social communication, limited or unusual eye contact, repetitive behaviors, sensory sensitivities, and delayed or atypical language development. Every Autistic child is unique, and signs can look very different from one child to another. A Speech-Language Pathologist (SLP) assessment is a helpful first step if you have concerns.

Signs of Autism to Watch For

Autism can present in many ways, and no two Autistic children are exactly alike. The signs below are organized by area of development. Not every Autistic child will show all of them, and some signs may be subtle, particularly in children who communicate verbally.

Social interaction

· Limited or absent eye contact
· Not smiling or sharing joy by 6 months
· Not responding consistently to their name
· Difficulty reading non-verbal cues
· Little interest in playing with other children

Communication

· No babbling by 12 months
· Not pointing or waving by 12 months
· No single words by 16 months
· Repeating phrases rather than original language
· Non-verbal or responds out of context

Behaviour & interests

· Repetitive movements (rocking, hand-flapping)
· Strong attachment to routines; distress with changes
· Very intense, narrow interests
· High sensitivity to sensory input (sounds, textures, lights)
· Repetitive play with objects

For children aged 16 to 30 months, the M-CHAT-R/F (Modified Checklist for Autism in Toddlers, Revised) is a free, validated screening tool parents can complete at home. A positive result does not confirm autism, but it is a useful prompt to bring to your child’s doctor or an SLP.

When Signs Typically Become Noticeable

Signs of autism can appear at different ages. Some families notice differences in the first year of life, while others may only become aware of challenges as social and communication expectations increase in toddlerhood or the early school years.

Age	Signs that may be present
6 months	Limited smiling or joyful expressions; not following faces or voices
9 months	Limited back-and-forth sounds or facial expressions with caregivers
12 months	Not babbling; not pointing, reaching, or waving; not responding to name
16 months	No single words yet
24 months	No two-word phrases; any loss of previously acquired language or social skills
School age	Social difficulties, rigid thinking, sensory sensitivities, or communication challenges become more apparent in structured settings

Any loss of language or social skills at any age is worth discussing with your child’s doctor or an SLP promptly.

Understanding the Autism Spectrum

Autism is a spectrum, meaning the signs and their intensity can vary widely from one child to another. Some Autistic children have few support needs and thrive in mainstream settings with minimal accommodation. Others may benefit from more structured support across home, school, and community. There is no single profile of autism, and a formal assessment looks at a child’s full developmental picture, not any one area of difficulty in isolation.

Speech-Language Pathology & Autism

A Speech-Language Pathologist (SLP) is often among the first professionals to notice signs consistent with autism, particularly when speech or language development appears delayed or atypical. SLPs are trained to assess both spoken and non-verbal communication, identify patterns that may point toward autism, and work alongside pediatricians, psychologists, and developmental specialists throughout the assessment process.

In therapy, an SLP works with Autistic children and their families on communication goals that are meaningful in daily life. This may include building functional language, introducing Augmentative and Alternative Communication (AAC) strategies, improving social communication, or helping a child navigate sensory-language challenges. Goals and methods are always individualized to the child.

For families in British Columbia, Arbutus Speech Therapy holds Registered Autism Service Provider (RASP) designation. This means our SLP services may be used under BC autism funding programs for Autistic children ages 6 and under. We also support Autistic children and youth ages 7 to 19. Many extended health plans in BC cover SLP services as well. Check with your provider about your specific coverage.

Parenting an Autistic Child

As a parent, no one knows your child better than you do. Your observations and instincts matter, and sharing them with your child’s healthcare team is a valuable part of the assessment and support process. Building an informed support team is one of the most meaningful steps you can take for your child’s development.

If you are concerned, start by keeping a record of the specific behaviors you are noticing and when they appear. Note any changes over time. If your child has had previous assessments, therapy, or school reports, gather those as well. That information will be useful in any consultation or referral appointment.

Why early support matters

Research consistently supports early intervention for Autistic children as beneficial for communication, social participation, and daily life. You do not need a formal diagnosis to start speech therapy. An SLP can begin working with your child while an assessment is in progress.

Based in BC? We Offer a Free Consultation

If you are concerned about your child’s development, consider booking a free phone consultation with a Speech-Language Pathologist at Arbutus Speech Therapy. It is a supportive, no-pressure way to talk through your concerns and explore the best path forward. We work with families in Vancouver and across British Columbia, in person and via teletherapy.

Frequently Asked Questions

At what age should I seek help if I notice signs of autism?

There is no minimum age. If you have concerns about your child’s communication, social development, or behavior at any point, speaking with an SLP or your pediatrician is a reasonable next step. Early support, even before a formal diagnosis, can be very helpful.

Can a Speech-Language Pathologist diagnose autism?

SLPs do not make a formal autism diagnosis, but they play an important role in the assessment process. An SLP can assess communication and language in detail, and often works alongside pediatricians, psychologists, and developmental specialists to build a complete picture of a child’s needs.

Is there funding available for autism services in BC?

BC offers funding programs to support families with Autistic children. Arbutus Speech Therapy holds RASP designation, which means our services may be covered under eligible BC funding programs. Because program details are currently in transition, we encourage families to book a free consultation or visit our funding guide for the most current information.

What is the difference between a speech delay and autism?

A speech delay refers to slower-than-expected development of speech and language while otherwise following a fairly typical developmental path. Autism may involve speech and language differences, but also affects social communication, behavior, and sensory processing more broadly. Some children experience both. An SLP assessment can help clarify what is present and what kind of support would help most.

For more information on autism, visit the CDC’s Autism Resource Center.