You called your toddler’s name three times at the park, and they never turned around. You brushed it off at first, but later that night, it was still on your mind.
If this sounds familiar, you’re not overreacting, and you’re not alone. Many parents carry this kind of quiet concern for months before saying it out loud. An autism evaluation can help turn that uncertainty into clarity by identifying whether your child’s development follows expected milestones or whether further support may be helpful.
The first step is knowing what typical development looks like at each age, and what might raise a question.
Early Signs Your Child May Need an Autism Evaluation
Many developmental differences show up before a child’s second birthday. Before age 1, there are many other reasons a baby might not be meeting a milestone, which is part of why diagnostic testing typically isn’t done until closer to age 2.
Early Developmental Milestones by Age Group
- 12 months. Most babies babble, use simple gestures like pointing or waving, and turn toward their name. If your child isn’t reaching these milestones, or rarely responds to their name, it may be worth mentioning at a checkup.
- 18 months. Toddlers this age often try to say three or more words besides “mama” or “dada,” point to show you something interesting, and follow simple one-step directions without gestures, like giving you a toy when asked. Limited words, or not following simple directions, is something to keep an eye on.
- 24 months. By now, many toddlers notice when others are hurt or upset, like pausing or looking concerned when someone cries, and look to your face to see how to react in a new situation. Little response to others’ emotions, or not checking in with you this way, can be a good reason to check with your pediatrician.
The CDC Milestone Tracker Checklist offers a helpful visual reference for each age.
Critical Red Flags at Any Age
A few signs deserve a closer look, regardless of your child’s age:
- Sudden loss of speech or social skills your child previously had
- Ongoing avoidance of eye contact or a strong preference for playing alone
- Trouble reading facial expressions or understanding how others feel
- Repetitive movements, such as hand-flapping, rocking, or spinning
- Strong reactions to sounds, textures, or lights that seem more intense than expected
One sign alone does not necessarily indicate autism, but a pattern of developmental differences or missed milestones should be discussed with your pediatrician.
When Should Parents Consider an Evaluation?
The American Academy of Pediatrics recommends autism screening at 18 and 24 months, alongside regular developmental checkups. Early intervention is often most effective because young children have greater developmental flexibility during the first few years of life.
Waiting to “see if it resolves” is common and understandable. But acting early often means less stress down the road, and it usually starts with a simple screening.
As you get started, you’ll likely hear these two terms:
- Developmental screening. A quick check at a routine pediatric visit (using a brief questionnaire) can flag whether a closer look is needed. While this doesn’t provide a diagnosis, it’s often the first step toward further support.
- Diagnostic evaluation. A longer, more comprehensive process, often across several hours or visits. It includes direct observation, caregiver interviews, and standardized tools, and results in an official determination.
Neither a screening nor a diagnostic evaluation locks you into anything. Each one simply gives you information you can act on.
What Happens During an Autism Evaluation
A formal evaluation is usually completed by specialists trained in diagnosis, such as:
- Neuropsychologists
- Developmental pediatricians
- Clinical psychologists
- Licensed clinical social workers, often through Birth-to-Three or early childhood programs
These evaluations consider your child’s overall development rather than focusing on a single behavior or isolated incident. They consider communication, social interaction, play skills, and daily routines together.
Know What to Expect During the Assessment
Evaluations are generally designed to feel comfortable for young children, using play and interactive tasks rather than formal testing. Your child might build with blocks, look at picture books, or engage in simple play-based activities.
Your child’s evaluator will review medical records and ask about daily routines like sleep, eating, and play.
Depending on your child’s age and developmental concerns, specialists may use one or more standardized assessment tools, including:
- M-CHAT-R (a caregiver questionnaire for early screening)
- ADOS-2 (a structured clinical observation)
- ADI-R (a detailed caregiver interview on developmental history)
- Vineland Adaptive Behavior Scales (measures everyday skills like communication and self-care)
- ABAS (assesses adaptive behavior across settings)
Not every child is evaluated using the same tools. The exact approach depends on your child’s age, needs, and the specialist involved.
Understand the Role of ABA Therapy for Autism
If diagnosed with autism, ABA (Applied Behavior Analysis) is a well-researched therapy option that uses positive reinforcement to help children build functional skills at their own pace.
Communication is a core focus in ABA therapy for autism. When a child has real ways to express needs or navigate transitions, frustration-related behaviors often ease. During a task like cleaning up toys, a therapist might reinforce a visual cue or gesture to signal readiness to move on.
Depending on your child’s needs, their ABA plan may differ in:
- Program intensity. Some children attend a clinic-based ABA day program a few days weekly, while others need a more intensive ABA-based program with several daily hours of support.
- Goals. These often include communication, social interaction, daily self-care, and reducing maladaptive behaviors that interfere with learning and connection.
- Support. Some children may also benefit from multidisciplinary support, including occupational therapy (OT), physical therapy (PT), or speech therapy alongside ABA.
Take These Practical Next Steps
If any of this resonates, here’s where to start:
- Write down specific behaviors you’ve noticed, including when and how often they happen.
- Schedule a conversation with your pediatrician about a formal screening.
- Use the CDC’s free “Learn the Signs. Act Early.” program to compare your observations against typical milestones.
If you’re wondering how to find therapists offering early intervention services for babies with developmental delays, your pediatrician’s referral to your state’s Birth-to-Three program is typically the fastest starting point.
Supporting Your Child and Family, Every Step of the Way
Milestones, evaluation, and therapies like ABA aren’t separate hurdles. They’re part of the same path, each one bringing more clarity.
Whether your child faces autism, sensory challenges, or developmental delays, trusting your instincts is where this journey begins. You don’t need every answer today. You need the next step, and the knowledge that you’re not taking it alone.
