Learn The Sign Of Autism

Global Relief and Support Corporation - Extending Support for Autism

A guide for families

If you have found your way to this page, you are probably watching your child closely and wondering about something — a name that goes unanswered, words that were there last year and are not there now, a child who is happiest lining up toys by colour. Noticing is not diagnosing. It is simply paying attention, and paying attention is one of the most useful things a parent, grandparent, or teacher can do.

Autism is a developmental difference in how a person communicates, relates to other people, and experiences the world around them. It is common: the CDC's most recent surveillance estimate identifies autism in about 1 in 31 children. It is also lifelong, and it is not something a child does wrong or something a family causes.

This page describes patterns that are often seen in autistic children and adults. Any one of them, on its own, usually means very little — children develop at their own pace, and plenty of children who show one or two of these signs are not autistic. What matters is the overall picture over time, and whether a pattern is persistent across different places and different people.

Only a qualified professional can diagnose autism. This guide will not tell you whether your child is autistic, and it is not a checklist to score. What it can do is help you describe what you are seeing clearly enough to have a productive conversation with your pediatrician — and give you a sense of when it is worth asking sooner rather than later.

Support does not have to wait for a diagnosis. In New York, a child can be evaluated and begin receiving services while questions are still open.

The two areas professionals look at

Clinicians who assess autism work from the DSM-5, the diagnostic manual used in the United States. Stripped of its technical language, it asks about two broad areas. A diagnosis generally requires meaningful differences in both, present from early childhood, that affect everyday life.

1. Social communication

How a person shares attention, feelings and meaning with others. Differences here might look like:

  • Less back-and-forth in conversation or in play — the "serve and return" rhythm may be shorter or may not get started
  • Eye contact that is brief, fleeting, or used differently than expected
  • Fewer gestures, facial expressions, or changes in tone of voice to go along with words
  • Not spontaneously pointing at things, showing things, or bringing things over to share enjoyment
  • Difficulty picking up unspoken social rules, or making and keeping friendships despite wanting them

2. Restricted and repetitive patterns

Behaviours, interests or routines that are repeated, narrow, or strongly preferred. This area includes:

  • Repetitive movements such as hand flapping, rocking, spinning or toe walking
  • Repeating words, phrases, or lines from videos (echolalia and scripting)
  • Lining up, sorting or arranging objects, and distress if they are disturbed
  • A strong need for sameness — the same route, the same cup, the same order of events
  • Deep, highly focused interests pursued with unusual intensity
  • Unusual responses to sensory input: sound, light, texture, taste, movement or touch

Autistic strengths sit inside these same traits. A focused interest can become real expertise. A need for consistency can mean reliability and precision. Recognising signs is not about cataloguing deficits; it is about understanding how a person is built so the world can be set up to fit them better.

Early signs, age by age

The milestones below are drawn from widely used developmental guidance, including the CDC's "Learn the Signs. Act Early." materials. They describe what most children do by a given age. A child who is not doing one of these things is not automatically autistic — but a pattern of missed social-communication milestones is a good reason to ask for a screening.

  1. By around 6 months

    Early social connection
    • Few or no big, warm smiles directed at familiar people
    • Limited eye contact, or little interest in looking at faces
    • Doesn't seem to notice or respond much to playful, affectionate interaction
    • Rarely makes sounds back when you talk or coo at them
  2. By around 9 months

    Back-and-forth begins
    • Little or no sharing of sounds, smiles or facial expressions back and forth
    • Doesn't respond consistently when their name is called (once hearing has been checked)
    • Doesn't look toward something when you look or point at it
    • Little interest in simple games like peekaboo
  3. By around 12 months

    Gestures and babble
    • Little or no babbling, or babbling that does not have a conversational rhythm
    • Few or no back-and-forth gestures — pointing, reaching, waving, showing
    • Doesn't bring objects over simply to share interest in them
    • Doesn't respond to their name most of the time
  4. By around 16 to 18 months

    First words and pretend play
    • No single words by 16 months is a commonly cited flag worth raising with a doctor
    • Doesn't point to show you something interesting (as opposed to pointing to request)
    • Little or no pretend play — feeding a doll, pushing a toy car as a car
    • Marked preference for playing alone; limited interest in what other children are doing
    • Lining up toys or objects rather than playing with them functionally
  5. By around 24 months

    Phrases, play and routine
    • No meaningful two-word phrases by 24 months (not counting repeating or imitating)
    • Repetitive movements — flapping, rocking, spinning, walking on tiptoes
    • Noticeable distress at small changes in routine or environment
    • Unusual reactions to sound, texture, light, smell or taste
    • Limited imitation of what adults or other children do
  6. Age 3 and older, including school age

    Social demands increase
    • Difficulty with back-and-forth conversation; talking at length about a favourite topic without reading the listener
    • Taking language literally; trouble with sarcasm, idiom or implied meaning
    • Trouble reading tone of voice, facial expressions, or unwritten social rules
    • Wanting friends but struggling to make or keep them
    • Intense, highly focused interests that dominate play and conversation
    • Strong need for routine, with real distress when plans change unexpectedly
    • Meltdowns or shutdowns after sensory or social overload — different from ordinary tantrums (see our guide to meltdowns versus tantrums)
    • An uneven profile: strong skills in some areas alongside unexpected difficulty in others

At any age: loss of skills. If a child who was babbling, using words, waving, or making eye contact stops doing those things, that is called regression, and it is a reason to contact your pediatrician promptly rather than waiting for the next well-child visit. Regression can occur in autism and in other conditions, and it always deserves a professional look.

Sensory signs

Many autistic people experience sensory input more intensely, less intensely, or simply differently than others do. Sensory differences are part of the diagnostic criteria, and they are often what families notice first — long before anyone uses the word "autism." The same child can be over-responsive in one sense and under-responsive in another, and it can vary by day, by fatigue, and by stress level.

Over-responsive

  • Covering ears at vacuums, hand dryers, sirens, or a noisy cafeteria
  • Distress at clothing tags, seams, socks, or certain fabrics
  • Strong food refusals based on texture, smell or colour rather than taste
  • Discomfort in bright or flickering light, especially fluorescents
  • Dislike of light touch, hugs, hair brushing, nail cutting or dental care
  • Becoming overwhelmed in crowded, busy or unpredictable places

Under-responsive or sensory-seeking

  • Seeming not to notice a call, a loud noise, or someone entering the room
  • High pain tolerance; not reacting much to bumps, scrapes or cold
  • Seeking deep pressure — tight hugs, heavy blankets, squeezing into small spaces
  • Craving movement: spinning, rocking, jumping, crashing into cushions
  • Mouthing, licking or smelling objects beyond the usual age
  • Fascination with visual detail — spinning wheels, running water, lights

For strategies and a fuller explanation, see our detailed guide to sensory issues in autism.

When autism looks different

The classic descriptions of autism were built largely from studies of young boys with clearly visible traits. That history still shapes who gets identified and who gets missed.

Girls and women

Autistic girls are often identified later, or not at all. Many learn to camouflage — copying the social behaviour of peers, rehearsing conversations, holding eye contact deliberately, keeping distress hidden until they get home. Their focused interests may look socially conventional (animals, books, a particular singer) and so attract less notice. Masking is exhausting, and burnout, anxiety or depression is sometimes what finally brings a girl to assessment.

Read more about autism in girls and women →

Teenagers and adults

Plenty of autistic people reach adulthood undiagnosed, often those who did well academically or whose difficulties were read as shyness, anxiety, or being "a bit particular." Recognition frequently comes when demands rise — university, a first job, parenthood — or when a child's assessment prompts a parent to recognise themselves. A later diagnosis is still valuable: it reframes a lifetime of experience and opens doors to accommodations and support.

Read more about signs of autism in adults →

Autism also co-occurs with other conditions — ADHD, anxiety, epilepsy, gastrointestinal problems, sleep difficulties and intellectual disability among them. The presence of another diagnosis does not rule autism out, and vice versa.

What is not a sign

Families arrive at this subject carrying a great deal of misinformation. It is worth clearing some of it away.

"Autism is caused by something the parents did."
It is not. Autism has a strong genetic component and begins in early brain development. Parenting style, discipline, screen time, working parents, and divorce do not cause autism. The "refrigerator mother" theory was discredited decades ago.
"Vaccines cause autism."
They do not. This claim originated in a 1998 paper that was retracted for fraud, and it has since been tested in very large studies across many countries, involving millions of children, with no link found. Autism-related brain differences are present before the age at which the vaccines in question are given.
"My child is shy and a late talker, so they must be autistic."
Not necessarily. Shyness, a quiet temperament, and late speech each have many possible explanations, including hearing loss, a language delay with no autism involved, or simply an individual pace. What distinguishes autism is the combination of social-communication differences with restricted or repetitive patterns, present across settings. A late talker who points, shares enjoyment, plays pretend and follows your gaze has a very different profile.
"Autistic people don't feel empathy or love their families."
Autistic children form deep attachments to their parents and caregivers, and autistic people feel emotion and care about others — sometimes very intensely. What can differ is how feelings are read in others and how they are expressed outwardly. A child who does not run to the door to greet you may still be profoundly attached to you.
"They make eye contact, so it can't be autism."
Many autistic people do make eye contact, particularly with people they know well or after learning to do it deliberately. No single behaviour rules autism in or out. Similarly, being verbal, affectionate, academically able, or good at a subject does not rule it out.

What to do if you have concerns

The most common thing families tell us afterwards is that they wish they had asked sooner. Waiting to "see if it passes" costs time in the years when support does the most good. Here is a practical path.

  1. Write down what you are seeing

    Before the appointment, note specific examples with dates: what happened, where, and how often. "He answers to his name maybe one time in five, mostly when the TV is off" is far more useful to a clinician than "he doesn't always listen." Note anything that has been lost as well as anything that has not appeared. Phone videos of everyday moments can be genuinely helpful.

  2. Talk to your pediatrician and ask directly for a developmental screening

    Use plain, specific words: "I am concerned about my child's development and I would like a developmental and autism-specific screening." The American Academy of Pediatrics recommends general developmental screening at 9, 18 and 30 months, and autism-specific screening at 18 and 24 months. You can request one outside those visits if you have concerns. Ask for a hearing test too — hearing loss can look like some of the signs above and should always be ruled out.

  3. If you are told to "wait and see," ask again

    Sometimes waiting is reasonable. But if your concern persists, you are entitled to ask for a referral to a developmental pediatrician, child psychologist, child neurologist, or a specialised evaluation centre — or to seek a second opinion. Persistence is not being difficult; it is advocacy.

  4. In New York, you can self-refer to Early Intervention

    If your child is under age 3, you do not need a doctor's referral. A parent can contact their county's Early Intervention Program directly and request an evaluation. Evaluation is provided at no cost to families, and eligibility is based on developmental need, not on having an autism diagnosis. For a child aged 3 or older, contact your school district in writing and request an evaluation through the Committee on Preschool Special Education (CPSE) or the Committee on Special Education (CSE).

  5. Start support while you wait

    Evaluation waiting lists can be long. Speech therapy, occupational therapy and early developmental support do not require a diagnosis first and are helpful for a wide range of children. Nothing about beginning support commits you or your child to any particular conclusion.

  6. Take care of the rest of the family too

    This period is stressful for parents and for siblings. Connect with other families who have been through it — locally or online — and see our guidance on supporting siblings. You do not have to work this out alone, and GRS Corp is here to help New York families do exactly this.

Please note: This page is for information and education only. It is not a diagnostic tool, it is not medical advice, and it cannot tell you whether you or your child is autistic. Only a qualified professional — such as a developmental pediatrician, child psychologist, child psychiatrist, or neurologist — can make a diagnosis, using direct observation, developmental history and standardised assessment. If you have concerns about your child's development, speak with your pediatrician or contact your county's Early Intervention Program. If anyone is in immediate danger or crisis, call 911, or call or text 988 for the Suicide & Crisis Lifeline.

Next steps, whenever you are ready

Noticing something is the hardest part, and you have already done it. Whatever the answer turns out to be, the path forward is the same: get a clear picture, get an evaluation, and get the right support in place. GRS Corp supports autistic people and their families across New York State, and there is never a charge to ask us a question.