Some children start speaking later and then catch up with their peers without any intervention. Others do not catch up, and without help the difficulty remains. From the outside, at the age of two, these two groups often look identical. That is why 'wait and see' is risky advice.
What the assessment looks at
A speech and language assessment does not only measure how many words the child says. It separates several things a parent rarely separates, and that separation is what makes the difference.
- Understanding versus expression: a child who understands well and says little is in a different position from a child who does not understand.
- Non-verbal foundations: eye contact, pointing, joint attention, imitation.
- Rate of growth: are new words appearing month by month, or has vocabulary plateaued?
- Hearing: a precondition of language development, to be ruled out where the history suggests it.
- Family history and the circumstances of development.
Signs that lean towards a difficulty
A child who is simply a later talker usually communicates vividly without words, understands what is said to them, and has a vocabulary that - however small - is growing. When those are missing, the picture leans towards a difficulty that needs work: vocabulary has plateaued, understanding is weak, non-verbal communication is poor, or a skill has been lost.
Why it matters to know
If the child is only a later developer, the assessment tells you so and releases you from months of uncertainty. If there is a difficulty, intervention starts when it is most effective. Either way the benefit runs one way - there is no price paid for asking.