Social and communication signs
Limited eye contact, not responding consistently when their name is called, delayed or absent babbling and first words, and limited interest in pointing, showing or sharing enjoyment with others are all worth noting.
Play and behaviour signs
A strong preference for repetitive movements or routines, intense focus on specific objects or parts of objects, and limited interest in pretend or shared play with other children can also be early indicators.
What these signs do (and don't) mean
No single sign confirms autism, and every child develops differently. But noticing several of these signs together, especially if a paediatrician or teacher has also raised concerns, is a reasonable basis to seek a developmental screening.
What to do next
Start with your paediatrician, who can refer you for a developmental screening or a full autism assessment. You don't need to wait for a finalised diagnosis to begin supportive, play-based early intervention if a screening suggests it would help.
Common questions
Reliable signs can often be observed from around 18 months, though many children aren't formally diagnosed until later.
Speak to your paediatrician first. They can guide you toward a developmental screening or refer you for a full evaluation.
Written by The Outcomes ABA clinical team. This article is for general information and isn't a substitute for an individual clinical assessment.