Developmental Signs by Age: When It’s Worth Asking for an Evaluation

Why “wait and see” is poor advice

Two reasons, and neither has anything to do with panicking.

The first is that a young child’s brain changes faster between one and three than at any other point in life. A skill that takes a few months to teach at two can take a great deal longer at five. It is not that a door closes. It is that the work is easier now.

The second is simpler. Asking for an evaluation commits you to nothing. It is not a diagnosis, it does not start any therapy, and it does not go into a school record. It is a session where someone trained watches your child play and tells you what they see.

12 months

At this age nearly everything important happens before there are words. A twelve-month-old communicates enormously, just without talking.

What to expect:

• Responds to her name. Turns when you call, even when she is busy.
• Points, reaches, lifts her arms. Uses her body to ask and to show.
• Babbles with intonation. Strings of sound that sound like conversation even though they are not words.
• Plays back-and-forth games. Peekaboo, give-and-take, clapping with you.
• Looks at your face when something interesting happens. Looks at the toy, looks at you, looks back at the toy.

Worth asking about if: she does not respond to her name consistently, does not point or use gestures to ask, or has stopped doing things she used to do.

That last one, losing something she already had, is the only sign on this list that should not wait. Call that week.

18 months

Words start here, but words are not the only thing being looked at.

What to expect:

• Several words besides “mama” and “dada.” They do not have to sound perfect. They count if he always uses them for the same thing.
• Points to show, not only to request. He sees a dog and points it out just so you see it too. This is called joint attention and it is one of the most important signs on this whole list.
• Imitates what he sees you do. Sweeping, talking on the phone, stirring a pot.
• Starts pretend play. Feeding a stuffed animal, pushing a toy stroller.
• Follows simple instructions. “Give me the ball,” without you pointing at it.

Worth asking about if: he says no words, does not point to show, or does not seem interested in drawing your attention to things.

24 months

What to expect:

• Puts two words together. “More water,” “mama come,” “no want.” Not sentences: combinations.
• Is somewhat understandable. A stranger should understand roughly half of what she says.
• Points to things in a book when asked. “Where’s the cat?”
• Follows two-step instructions. “Get your shoes and bring them to me.”
• Copies what other children do.

Worth asking about if: she only uses single words, does not imitate, does not follow simple instructions, or repeats whole lines from cartoons without using them to communicate anything.

36 months

What to expect:

• Talks in sentences and is understood almost always, including by someone outside the family.
• Asks questions. What, who, where, and the endless why.
• Plays with other children, not just next to them.
• Tells you about something that happened. Even out of order and in three words.
• Handles a small change in routine without the day falling apart.

Worth asking about if: he does not form sentences, is hard to understand, does not play with other children, or any small change sets off a meltdown that lasts a long time.

Signs that do not depend on age

Some things are worth a consultation at any age:

• Losing skills he already had. Words, gestures, eye contact, interest in others. This is always worth calling about, and soon.
• Very strong reactions to sounds, textures, lights, or clothing tags, to the point that the family organizes the day around avoiding them.
• Eating fewer than about fifteen or twenty different foods, or dropping foods that used to be accepted.
• Trouble sleeping or settling that does not improve over time.
• A teacher or caregiver tells you they see something. They see many children the same age every day. Their comparison has value.

And one more that appears on no official list: if you have been carrying a worry for months and it will not go away. That instinct is right more often than people think, and an evaluation is the cheap way to settle it.

What if you ask for an evaluation and everything is fine

That happens often. And it is still worth it.

You leave with a concrete answer instead of a doubt going in circles. You leave with a reference point in case you want to compare six months from now. And you leave, nearly always, with two or three practical things you can do at home to support what is already going well.

No evaluation is wasted time. The one that comes back clear takes a weight off you. The one that finds something finds it at the best possible moment.