Receptive language

Also called Comprehension, Understanding of language, Language comprehension

Understanding what is said to you. It runs ahead of speaking in nearly everyone, and it is the part people forget to test.

What it is

Receptive language is understanding: taking in words, sentences and the meaning behind them, whether they arrive as speech, sign, symbols or print. It's the input side of language. Expressive language is the output side.

The two are not the same skill and they don't develop at the same rate. A toddler follows "get your shoes" months before they can say it. An adult after a stroke may understand every word of the news and be unable to name a cup. In almost everyone, understanding runs ahead of expression, and in non-speaking people the gap can be enormous.

Who it can help

Knowing about receptive language helps anyone supporting a person whose expression is limited: a child with few words, an autistic person who doesn't answer, an adult with aphasia or dementia. The question "how much do they understand?" is the one that decides how you talk to them, and it's the one that gets guessed at most.

It is not a reason to talk down to anyone. The honest default, when you don't know, is to presume competence and speak normally. Simplify only what the person has shown you they need simplified.

How it works

Understanding builds in layers. First single words in context: "cup" while the cup is in view. Then two key words: "put the cup on the table" needs the person to hold both cup and table. Therapists talk about information-carrying words for exactly this reason: an instruction with three words the person must actually process is harder than one with three words they can guess from the situation.

Grammar comes next: "the dog chased the cat" and "the cat chased the dog" contain the same words and mean opposite things. Then longer sentences, abstract words, idioms and inference, the meaning that was never said. Assessment tries to separate these layers, and a therapist's report will often say something like "understands at a two-word level", which means two information-carrying words, not two-word sentences.

Context does a lot of the work. Most people follow far more in a familiar routine than in a test room, which is why a nursery says "she understands everything" and the assessment says otherwise. Both are describing something real.

Getting started

This week, notice how much your instructions lean on context. Say "get your coat" while pointing at the coat, then another day say it with your hands still and see what happens. That's a rough test of whether the words themselves are being understood.

Give one instruction at a time, then wait. Add wait time of a good ten seconds before repeating, because repeating too fast restarts the processing. Pair words with a gesture, a sign or a symbol: multi-modal communication helps understanding as much as expression.

If you're unsure whether the person understands, don't just ask "do you understand?", because most people say yes. Ask them to do something, or to choose between two things, and watch.

Where to get help

Speech and Language UK publishes ages and stages for understanding as well as talking, and runs a free helpline for parents. A speech and language therapist assesses understanding formally; the route in is a referral, which in most areas a parent can make directly.

For adults after stroke or brain injury, the Stroke Association and Headway both explain comprehension difficulties in plain terms.