Every child develops at their own pace, but some differences may make parents wonder when to seek guidance. The early signs of autism in toddlers can include delayed speech, limited gestures, differences in eye contact, and repetitive behaviors. Some signs may appear during infancy, while others become more noticeable as children grow. Recognizing these patterns can help parents understand their child’s development and decide when to consult a healthcare professional.
For families in New Jersey, identifying potential signs early can help them explore appropriate developmental support. Apple ABA provides personalized, in-home ABA therapy tailored to each child’s strengths, needs, and family goals.
What Are the Early Signs of Autism in Toddlers?
The early signs of autism in toddlers often involve differences in social communication, language development, play, and behavior. Some children respond less often to their names, use fewer gestures, or repeat certain movements. These behaviors vary widely, and no single sign confirms autism spectrum disorder (ASD). Professionals consider several areas of a child’s development together, which is why understanding how autism is diagnosed can help parents know what to expect from an evaluation.
Autism is a developmental disability that affects how people communicate, interact, and experience the world. Signs may become noticeable between 12 and 24 months, although some appear earlier or become more apparent later. Autistic children also have different strengths, interests, and support needs.
Social and Communication Differences
Social communication involves much more than spoken language. Young children use facial expressions, gestures, sounds, and shared attention to connect with others. Differences in these skills may be among the earliest autism signs parents notice.
Common signs include:
- Limited response to name: A toddler may not consistently turn or look when someone calls them, even when they seem to hear other sounds.
- Differences in eye contact: Some children make less eye contact during social interactions, although many autistic children make eye contact.
- Fewer gestures: A child may rarely point to show something interesting, reach to communicate, or wave goodbye.
- Limited shared attention: A toddler may not often look between a parent and an interesting object to share enjoyment.
- Delayed language development: Some children have a limited vocabulary, difficulty combining words, or differences in how they use spoken language.
These behaviors matter most when they form a consistent pattern or occur alongside other developmental concerns. Hearing differences, language delays, and other conditions can also affect communication.
Repetitive Behaviors and Sensory Differences
Autism can also involve restricted interests, repetitive behaviors, and differences in sensory processing. A toddler might repeat the same body movements, show an intense focus on a particular object, or prefer familiar routines.
For example, a child may repeatedly spin the wheels of a toy car rather than use it in other ways. Another might become distressed when the family takes a different route home or when an expected activity changes.
Sensory sensitivities can also affect daily activities. Some children cover their ears around loud noises, avoid certain textures or foods, or seek particular types of movement and sensory input. Others show reduced reactions to sensations that most children notice.
These experiences are not always signs of autism. What matters is the broader pattern and whether the child needs support with communication, comfort, participation, or everyday activities.
Early Signs of Autism by Age: 12 to 36 Months
Signs of autism can become noticeable at different points between 12 and 36 months. This guide focuses on four key developmental checkpoints at 12, 18, 24, and 36 months to help parents recognize changes in communication, social interaction, and play. These checkpoints are useful for tracking development, but concerns can arise at any age.
Early Signs of Autism at 12 Months
By their first birthday, many babies respond to familiar people, play simple social games, and use gestures such as waving. They may also make sounds to communicate or use a special name for a parent.
Possible concerns include limited social engagement, infrequent gestures, or an inconsistent response to their name. Some babies may show little interest in back-and-forth games or sharing attention with caregivers.
One missed milestone does not mean a baby has autism. However, parents should discuss persistent concerns with their pediatrician rather than waiting to see whether several more milestones are missed.
Signs of Autism at 18 Months
Around 18 months, social and communication development becomes easier to observe. According to the CDC’s developmental milestones, most children this age point to show something interesting and try to say at least three words besides “mama” or “dada.”
A toddler who rarely points to share interest, has limited spoken or nonverbal communication, or shows little interest in social imitation may benefit from further evaluation.
Parents may also notice repetitive movements, sensory sensitivities, or difficulty adjusting to changes in daily routines. These behaviors should be considered alongside the child’s overall developmental progress.
Signs of Autism in a 2-Year-Old
By age two, most children use at least two words together, such as “more milk,” according to the CDC. They also use gestures, respond to simple communication, and begin combining toys in play.
Some autistic toddlers have difficulty using words or gestures to share needs and interests. Others develop spoken language but use repeated phrases, sometimes called echolalia, or communicate differently during social interactions.
A child might repeatedly line up toys, focus intensely on spinning objects, or prefer familiar activities. Parents may also notice differences in how their child responds to other kids or joins shared play.
Signs of Autism at Age 3
At three years old, many children take part in short back-and-forth conversations and notice other children playing. Pretend play and social interaction also continue developing.
A child who has difficulty participating in conversations, joining play, or adjusting to everyday changes may need developmental support. Some autistic children speak fluently but still experience differences in social communication or sensory processing.
Children develop at different rates, so these observations are reasons for discussion rather than conclusions about a diagnosis.
Age-Banded Checklist: Developmental Signs to Watch For
Parents can use this checklist to organize their observations before a pediatric appointment. It highlights developmental skills commonly expected at different ages and examples of concerns worth discussing.
The checklist draws on the CDC’s Learn the Signs. Act Early. developmental milestones. It is intended to help parents organize their observations before speaking with a healthcare professional, not to screen for or diagnose autism.
| Age | Developmental skills to observe | Concerns to discuss |
| 12 months | Social games, gestures, response to familiar people | Few gestures, limited social responses, or loss of skills |
| 18 months | Pointing to share interest, early words, imitation | Limited pointing, delayed communication, or reduced shared attention |
| 24 months | Two-word phrases, gestures, shared play | Limited functional communication, repetitive play patterns, or loss of skills |
| 36 months | Back-and-forth conversation, joining other children, pretend play | Persistent social communication differences, limited shared play, or significant difficulty with changes |
If you notice several concerns, write down examples and discuss them with your child’s pediatrician. You do not need to wait for a scheduled screening appointment to ask for help.
How Do Autism Signs Affect Communication and Play?
Autism can influence how toddlers share attention, express themselves, and participate in play. Some children have speech delays, while others speak but find back-and-forth interaction difficult. Parents may also notice differences in gestures, imitation, or pretend play. Observing these everyday interactions helps professionals understand a child’s communication development and individual support needs.
Speech Delays and Nonverbal Communication
A speech delay means a child develops spoken language more slowly than expected for their age. However, a language delay does not automatically indicate autism.
Some children understand spoken instructions but have trouble expressing themselves. Others may experience difficulties with both receptive language, which involves understanding words, and expressive language, which involves communicating thoughts and needs.
For autistic toddlers, communication differences may extend beyond vocabulary. A child might use words to request something but rarely point, gesture, or share an experience with someone else. When parents notice a speech delay, a pediatrician may recommend a hearing evaluation, speech-language assessment, or broader developmental evaluation.
Joint Attention, Imitation, and Pretend Play
Joint attention happens when a child and another person share interest in the same object or event. For example, a toddler might notice a passing airplane, point toward it, and look at a parent to share their excitement.
Reduced initiation of joint attention can be an early indicator of autism. Yet children show this skill in different ways, and professionals look at patterns across several activities.
Pretend play offers another useful example. A toddler may pretend to feed a doll, make a toy animal sleep, or act out a familiar routine. Differences in these play skills can provide developmental information, particularly when combined with other social communication concerns.
Rather than repeatedly testing a child, parents can observe what happens naturally during playtime, reading, and daily routines.
Do These Autism Signs Always Mean a Child Has Autism?
No. A child can have delayed speech, limited eye contact, repetitive movements, or sensory sensitivities without being autistic. Children develop at different rates, and some behaviors have several possible explanations. An autism diagnosis requires a professional evaluation of social communication, developmental history, and restricted or repetitive patterns of behavior.
Why One Behavior Is Not Enough for a Diagnosis
A toddler who enjoys spinning objects does not necessarily have autism. Likewise, a child who talks later than other children may have a language delay unrelated to autism.
Clinicians use criteria from the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR) when evaluating autism spectrum disorder.
These criteria consider persistent differences in social communication and interaction, along with restricted and repetitive behaviors, interests, or activities. Professionals also consider when the signs began, how they affect daily functioning, and whether another condition better explains the child’s development.
A child’s ability to make eye contact, show affection, or enjoy social activities does not automatically rule out autism.
When Developmental Changes Need Attention
One important concern is developmental regression, which means losing skills a child previously used.
For example, a toddler who regularly used several words may stop saying them. Another may become less responsive during familiar social activities or stop using gestures they previously demonstrated.
Changes like these deserve prompt medical attention, whether or not autism is the cause. Early identification can help families understand what is happening and access appropriate developmental support.
When Should Your Toddler Be Screened for Autism?
The American Academy of Pediatrics recommends autism-specific screening at 18 and 24 months. It also recommends general developmental screening at 9, 18, and 30 months. Parents can request additional screening whenever concerns arise. Screening identifies children who may need further evaluation; it does not provide a formal autism diagnosis.
Recommended Autism Screening Ages
Developmental screening helps professionals understand whether children are progressing as expected in communication, movement, behavior, and learning.
The CDC’s clinical screening guidance outlines the recommended ages for routine screening. Children with developmental concerns or certain risk factors may need additional screening outside these visits.
A pediatrician may use a standardized questionnaire, such as the Modified Checklist for Autism in Toddlers, Revised, with Follow-Up (M-CHAT-R/F), when appropriate.
Parents should share any concerns about eye contact, communication, social interactions, repetitive behaviors, or developmental regression, even if a previous screening did not indicate a problem.
What Happens After a Screening?
If a screening suggests possible developmental differences, a pediatrician may recommend a comprehensive diagnostic evaluation.
Specialists gather information about the child’s development, observe communication and behavior, and consider other possible explanations for the concerns. Autism diagnosis does not depend on a single blood test or one behavior.
A professional evaluation can also help identify related needs, such as language delays, motor skills differences, or sensory challenges that may benefit from speech or occupational therapy.
Families seeking guidance about autism-related therapy services can contact Apple ABA to discuss their child’s needs, available support, and the assessment process.
What Should Parents Do After Noticing Early Signs?
If you notice possible autism signs, start by recording your concerns and speaking with your child’s pediatrician. You can seek developmental screening and early intervention services without waiting for every sign to become obvious. Clear observations, timely referrals, and appropriate professional guidance can help families make informed decisions about their child’s development.
Four Practical Steps for Parents
Many parents feel unsure about whether their concerns are significant enough to mention. You do not need to identify the cause of a behavior before asking for guidance.
These steps can help you prepare for a productive conversation and find the right resources.
- Write down specific observations. Record communication differences, repetitive movements, sensory reactions, or changes in skills. Include when they happen and how they affect everyday activities.
- Schedule a pediatric appointment. Discuss your child’s developmental milestones and ask whether formal screening, a hearing test, or a specialist referral would be helpful.
- Explore early intervention services. Contact your state’s early intervention program if your child may need developmental support. You can ask about an evaluation even while pursuing an autism diagnosis.
- Review recommended services. Ask how speech therapy, occupational therapy, developmental services, or individualized ABA therapy may support your child’s goals.
For example, if your toddler becomes upset around certain foods, note whether the reaction relates to taste, temperature, or texture. These details can help professionals better understand sensory differences and recommend practical support.
How Can Early Intervention and ABA Therapy Help?
Early intervention provides developmental support during a period when children are building communication, play, movement, and daily living skills. Depending on a child’s needs, services may include speech therapy, occupational therapy, developmental intervention, or ABA therapy. Individualized support focuses on meaningful goals, family participation, and helping children use skills in everyday settings.
Families exploring developmental support can also learn more about early intervention ABA therapy and how individualized services may help children develop communication, play, and daily living skills.
Individualized Support for Communication and Daily Skills
For autistic children who may benefit from ABA therapy, clinicians can create personalized goals based on their strengths, developmental needs, and family priorities.
Support may focus on helping a child request assistance, communicate discomfort, participate in play, or develop greater independence during daily routines. For example, a child who has difficulty communicating during mealtime may learn a comfortable way to request a preferred food, ask for help, or express that they are finished.
Therapists can also help families respond to challenging situations by understanding what the child is communicating and adapting the environment or teaching useful skills.
Progress varies from child to child, so regular assessments can help clinicians understand which strategies are useful and when treatment goals may need to change. Families should also have opportunities to discuss their child’s progress and adjust priorities as their needs evolve.
What Happens During an ABA Assessment?
Before treatment begins, a Board Certified Behavior Analyst (BCBA) assesses the child’s current skills, strengths, needs, and everyday challenges.
The ABA assessment and treatment plan process helps clinicians identify practical goals and develop an individualized approach to therapy.
The assessment may explore functional communication, play, social skills, daily living skills, and behaviors that affect the child’s participation or comfort. Clinicians use this information to guide treatment and monitor progress.
An ABA assessment focuses on planning behavioral therapy. It is different from the comprehensive diagnostic evaluation used to determine whether a child has autism.
How Does Apple ABA Support Families in New Jersey?
Apple ABA provides personalized, in-home ABA therapy for children with autism across New Jersey. Its family-centered approach combines individualized treatment planning, BCBA-guided care, flexible scheduling, and caregiver collaboration. By delivering therapy in familiar surroundings, the team helps children practice meaningful communication, social, and daily living skills within their everyday routines.
Personalized In-Home Therapy and Family Support
For some children, working in a familiar home environment can make it easier to practice skills during naturally occurring activities.
Instead of relying only on structured tasks, therapists can incorporate learning into playtime, daily routines, and family interactions. This approach helps caregivers understand how to support skills outside therapy sessions.
Apple ABA’s clinical team develops individualized goals and monitors progress so treatment can change as a child develops. Families can also receive guidance with enrollment, insurance coordination, and scheduling to help them navigate the process of accessing therapy services. Parents considering ABA therapy can explore Apple ABA’s assessment services to better understand how clinicians develop treatment plans based on their child’s needs.
Conclusion
Recognizing the early signs of autism in toddlers helps parents understand their child’s development and seek timely support. Early identification and professional guidance can help families address communication challenges, social differences, and developmental needs.
At Apple ABA, we provide personalized, evidence-based ABA therapy to support communication, social skills, and daily living skills. Our experienced therapists offer individualized, in-home care to help children build confidence and independence. Contact us today to learn how we can support your child and family.
FAQs
How to control autism symptoms?
Autism is a lifelong developmental condition, not an illness that needs to be cured. Supportive therapies can help autistic children build communication, social, and daily living skills while addressing challenges that affect their comfort or participation. Depending on individual needs, a care plan may include ABA therapy, speech therapy, occupational therapy, or caregiver support. The goal is to improve well-being and independence, not eliminate harmless autistic traits.
What are the top 3 signs of autism?
Three common areas of early autism signs are differences in social communication, restricted or repetitive behaviors, and sensory responses or strong preferences for routines. A toddler may use fewer gestures, repeat movements such as hand flapping, or react strongly to certain sounds or textures. These signs vary among children and may appear in different combinations. A professional evaluation considers the full developmental picture rather than relying on just three behaviors.
What are some signs that a 2-year-old is not autistic?
There is no single behavior that proves a 2-year-old is not autistic. Using gestures, speaking in short phrases, sharing interests, and engaging in social play are encouraging developmental skills, but autistic children can demonstrate them too. Some autistic toddlers make eye contact, enjoy affection, and develop spoken language. If you have concerns about your child’s development, screening offers more reliable guidance than looking for one reassuring behavior.
What does an autistic 2-year-old act like?
An autistic 2-year-old may have differences in speech, gestures, shared attention, play, or responses to sensory experiences. Some toddlers repeat movements, line up objects, use repeated phrases, or become distressed when routines change. Others enjoy social interaction and communicate with words but still show developmental differences. Because autism presents differently in every child, a qualified professional must evaluate the overall pattern of behaviors.
