Early Signs of Autism in Toddlers: What to Watch For

Recognizing Early Signs

Autism can be reliably diagnosed as early as 18 months, though most children are diagnosed around age 4. Knowing what to watch for can help you seek evaluation sooner — and earlier intervention leads to better outcomes.

Social Communication Signs

• Limited eye contact — Less frequent or shorter duration than typical peers
• Doesn’t respond to name — By 12 months, most children turn when their name is called
• Limited pointing or gesturing — Doesn’t point to show interest or wave bye-bye
• Reduced social smiling — Less responsive to social interactions
• Limited pretend play — By 18 months, most children engage in some pretend play

Behavioral Signs

• Repetitive movements — Hand flapping, rocking, or spinning
• Specific routines — Gets upset when routines change
• Intense interests — Unusually focused on specific topics or objects
• Lining up objects — Arranging toys in a specific order

What to Do If You’re Concerned

If you notice several of these signs in your child:

1. Talk to your pediatrician — Share your observations and ask about developmental screening
2. Request a formal evaluation — A developmental pediatrician, psychologist, or BCBA can conduct a comprehensive assessment
3. Don’t wait — You can pursue early intervention services while waiting for a formal diagnosis

Early Intervention Makes a Difference

Research consistently shows that children who receive ABA therapy early — ideally before age 5 — make significantly greater gains in communication, social skills, and adaptive behavior. The window of opportunity is real, and acting early gives your child the best possible start.