Processing speed is how quickly someone can take in simple information, make sense of it and respond. It isn’t a measure of intelligence. Plenty of pupils who think deeply, reason well and have excellent ideas simply need more time to show what they know.

In the classroom, though, time is everywhere: timed tasks, quick-fire questions, copying before the board is wiped, finishing before the bell. For a pupil with slower processing, that can make school feel like a constant race.

How processing speed affects reading

Reading involves many small steps happening fast: recognising letters, linking them to sounds, blending, recognising whole words and holding the sentence in mind long enough to understand it. If each step takes a little longer, the whole process slows down. By the end of a long sentence, a pupil may have lost the beginning.

That’s why slower processing often shows up as slow, effortful reading even when a pupil’s decoding is accurate. It can also make spelling, copying and written answers take much longer than expected.

How it relates to dyslexia

Slower processing speed is common in dyslexia, but it doesn’t cause dyslexia, and it isn’t only found there. A study comparing groups of children found slower processing in those with reading difficulties, and also in those with attention difficulties, with the reading group showing the larger difference.

So processing speed is most useful as one part of a pupil’s profile. Talamo’s Cognitive & Dyslexia assessment measures it with a timed task in which pupils scan rows of letters and click every matching pair. It’s reported alongside phonological awareness, working memory, reasoning, reading speed, reading comprehension and spelling. Slow processing alongside difficulties with sounds and spelling looks different from slow processing with secure phonological skills, which may point to attention rather than dyslexia. The profile helps staff tell those apart.

Where pupils answer on a touchscreen rather than a keyboard, the assessment applies a documented correction, because touch can make speeded tasks look faster than they really are.

What slower processing can look like

• pausing before answering, then giving a thoughtful answer

• taking a long time to start written work

• copying from the board slowly, or not finishing

• understanding a text when read aloud, but reading it slowly alone

• running out of time in tests despite knowing the material

• seeming “switched off” during fast-paced lessons, when they are really still catching up

None of these shows a lack of effort or ability. They show a pupil working at a different pace.

Practical ways to give pupils more time

These adjustments come from the “How to support” suggestions in Talamo reports:

• Allow thinking time. Pause after harder questions and keep the question visible while the pupil thinks. Let them jot a note or come back to a question after a moment.

• Mark the essential work first. Keep the full content and challenge, but cut repeated practice of the same skill. Treat any extra questions as optional practice.

• Plan extra time for demanding work. Build more time into complex questions, discussion and extended writing, not just tests.

• Reduce copying. Share printed notes or photos of the board, so time goes on learning rather than transcribing.

• Agree a finishing point for homework. If homework regularly takes much longer than intended, agree with the pupil and their family which tasks are essential and when to stop.

For older pupils, if processing speed consistently affects timed work, the SENCo can start gathering evidence, such as teacher observations, timed work and the support the pupil normally uses, in case exam access arrangements are needed later. A screening result can be part of that evidence, but it doesn’t replace the formal access arrangements process.

A clearer picture, fairer support

When schools look at processing speed alongside a pupil’s other skills, they’re less likely to mistake slowness for low ability, and more likely to give the right kind of help. Explore Talamo’s three assessments or see a sample report.