What Is Subvocalization?

The short version

Subvocalization is the habit of pronouncing words in your head as you read. It runs on the machinery of speech, and speech is slow. That is one reason the average adult reads about 250 words per minute. You can quieten subvocalization. You cannot remove it, and you should not try.

What subvocalization is

Read this sentence and listen. There is a voice.

It is your voice, saying the words as your eyes cross them. Most people hear it. Some feel it instead, as a flicker in the throat, the tongue, the lips. That is subvocalization. It is the tendency to pronounce words as you read them, out loud inside your head or in miniature in your muscles.

It is not a defect. It is how you learned. You were taught to read aloud, one word at a time, and silent reading arrived later as a quiet version of the same act. The sound never left. It went underground.

Our speed reading guide sets out the full picture. This page covers the one mechanism everybody blames, and it explains why the blame is only half deserved.

Subvocalization is not the same as reading aloud

Reading aloud is a choice. Subvocalization is a reflex. You cannot decide to stop hearing your inner voice the way you decide to stop speaking.

Try it now. Read the next line without hearing it.

You heard it. Almost everyone does. That reflex is the thing this page is about, and it is far more stubborn than the speed reading industry admits.

How to hear your own

Put two fingers on your throat, just below the jaw, and read a paragraph of anything at your normal pace.

Many people feel movement. The larynx makes tiny adjustments, shaping words that never get said. Those movements are real, they are measurable, and they are the physical residue of a habit built in childhood.

If you feel nothing, that does not mean you are free of it. Most subvocalization happens above the neck, in the brain, with no help from the throat at all.

Why it slows you down

The arithmetic is simple.

The speed of speech is a hard number

Human speech runs at about 150 words per minute in normal conversation. A fast newsreader pushes 180. An auctioneer, who has trained for years and is not saying much of substance, gets higher and sounds absurd.

Now put reading on top of that system. If the meaning of a word only becomes available to you after the word has been silently pronounced, then reading cannot outrun speech. It borrows the clock of speech.

The numbers line up

The average adult reads about 250 words per minute. Children read around 150, which is close to the speed at which they can say the words.

If you have never measured yourself, do that before anything else. Take the speed reading test and get a real number. Guessing your own speed is worthless, and most people guess high.

Why it is the flaw everybody talks about

Of all the things that slow a reader down, subvocalization is the one that touches almost everybody. Weak vocabulary slows some readers. Poor attention slows others. Subvocalization runs on every word, on every line, on every page.

That is why any honest account of reading speed has to deal with it. It is also why so much rubbish gets sold around it.

Where the promise came from

Somebody sold you this idea. It is worth knowing who.

Evelyn Wood was an American schoolteacher. She launched Reading Dynamics in 1959, taught readers to sweep a hand down the page, and claimed speeds in the thousands of words per minute. The course sold hard for decades, and the story it told was simple. Your inner voice is a childhood habit. Drop it and the page opens up.

The claims did not hold. When researchers tested very fast readers, comprehension fell as speed climbed. What looked like reading at 2,000 words per minute turned out to be skimming, and the readers filled the gaps with what they already knew about the subject.

Sixty years later the pitch is identical. The hand has been replaced by a phone.

The correction, and it is a big one

Here is where this page parts company with the rest of the internet.

Subvocalization is not a throttle bolted onto a fast machine. It is part of the machine.

What the research actually says

In 2016, five psychologists published a review in Psychological Science in the Public Interest asking how we read and whether speed reading can help. It is the paper the industry avoids.

Keith Rayner led it. He spent forty years measuring what eyes do when they read. With George McConkie he built the moving window paradigm, the instrument that measures how much text a reader takes in per fixation. He had no course and no app to sell.

Mary Potter co-signed it. In 1969 she invented Rapid Serial Visual Presentation, the flashing-word technique every speed reading app is built on. The paper that sets the limits of RSVP carries the name of the woman who created it.

Their central finding governs everything on this page.

Reading rate is limited by how fast your brain extracts meaning, not by how fast your eyes take in text.

Sit with that. Your eyes are not the bottleneck. Nor is the width of your vision, nor the speed of your saccades. The queue is in the part of you that turns words into sense, and the inner voice is one of the things standing in that queue doing useful work.

The eye movement arithmetic

Work out where your reading time goes and the whole industry collapses on contact.

A fixation, the pause where the eye lands, takes about 250 milliseconds. A saccade, the flick to the next word, takes 25 to 30. So saccades cost you roughly a tenth of your reading time and the pauses cost you the rest.

Now suppose you could double the speed of your eye movements. You cannot, but suppose. You would save five per cent of your reading time. That is the entire prize on offer from every product built around moving your eyes faster.

Nine tenths of your reading happens while your eyes are standing still. Whatever is slowing you down is happening in that pause, and the inner voice is only one of the things going on in there.

Long pauses are stalls, not habits

A fixation lasts about 250 milliseconds. When it runs long, the reason is not your eyes.

Your eye holds on a word because the brain has hit something it cannot process yet. An unfamiliar word. A clause that will not fit. An argument that assumes knowledge you do not have.

The pause is the processing. Cut the pause and you do not get comprehension faster. You get less of it.

Why you cannot remove the inner voice

The pitch has not changed in sixty years. Kill the voice, reading becomes pure sight, speed goes up several times over.

The problem with the promise

It does not survive contact with the evidence. Subvocalization runs on circuits you use for thinking, not only for reading. Push it out on hard material and comprehension goes with it. Readers who manage the silence report the same thing. The words go past, the eyes move, and nothing lands.

You have done this yourself. You have read a page, reached the bottom, and realised you took in none of it. That is what a text with no inner voice attached feels like. It is fast. It is also useless.

What the inner voice is for

Every page on the internet treats the voice as an enemy. That is a mistake, and it changes how you should train.

The voice holds words in working memory. When a sentence runs long and the subject sits ten words from the verb, the voice keeps the front of the sentence alive until the end arrives. Silence it and long sentences fall apart in the middle.

The voice carries rhythm and tone. Poetry dies without it. So does good prose, and so does any sentence where the meaning turns on emphasis rather than on words. A reader who has drilled the voice out of existence cannot hear irony.

The voice is also where difficulty shows up. On a contract, on a proof, on a paragraph of philosophy, the voice gets louder and slower. That is not a fault. That is the reading system telling you the text is hard and asking for more time.

What reduction actually looks like

The realistic goal is not silence. It is a voice you can turn down.

A trained reader still subvocalizes. They do it on the load-bearing words, the ones carrying the argument. They lean on the sound less for the connective tissue. The inner voice stops narrating and starts commenting.

Skilled readers already do this without thinking about it. They gallop through a familiar report and slow to a crawl on a contract, and the voice rises and falls with the difficulty. That is the skill. Not eliminating the voice. Governing it.

We set out the methods that work, and the ones that do not, on how to stop subvocalizing. Read it before you buy anything.

The techniques that make it worse

Some standard advice is harmful, and it is worth naming.

Counting out loud while you read, or chewing gum, or humming, works by occupying the speech system so it cannot pronounce. It succeeds. It also occupies working memory, which you need for comprehension, so the reader ends up faster and blanker. That is not reading. That is turning pages.

The other bad idea is the app, and it deserves a section of its own.

What the apps get wrong

Speed reading apps flash one word at a time at a fixed point on the screen. Give them credit where it is due, because the concession is what makes the criticism land.

RSVP genuinely does speed up word identification. It removes the cost of moving your eyes, and that cost is real.

But identifying words is not reading. Comprehension needs a preview of the words coming next, and it needs the ability to go back when something does not fit. RSVP removes both. Comprehension suffers, and it suffers more the longer the text gets.

The apps optimise the one part of reading that was never the constraint on understanding, and they break the two parts that were. The paper that says so is co-signed by the woman who invented the technique.

An honest complication

We are not going to pretend the researchers all agree, because they do not, and the disagreement is more useful than a tidy story.

A group at Sapienza University in Rome, led by Marialuisa Martelli, published their own study of the reading speed limit in 2016. They found that normal text reading is capped around 300 words per minute, and that the most expensive single step is executing the eye movements themselves. RSVP does reach 1,000 to 1,200 words per minute, and it reaches it only because it removes those eye movements.

That sounds like a win for the apps until you read the next line. Their paper says plainly that it does not address the full experience of reading, and it does not speak to comprehension. They measured word identification. That is all.

So Rayner’s group says the brain is the bottleneck. Martelli’s group says the eye movements are the most costly step. They disagree about which constraint binds first.

They agree the ceiling is real, and they agree it is low. Around 300 words per minute for reading you understand. Nobody in either camp is selling you a thousand.

The readers who cannot turn it down

Some people never manage to quieten the voice at all. They need to hear every word, and the reading goes at the pace of the hearing.

That is an observation, not a diagnosis, and we are not going to give you a percentage or a wall in words per minute, because nobody has one that stands up.

What we will say is this. If you have practised for months, your comprehension is strong, and your speed will not move, stop grinding. Continuing will make you tired and it will make you resent reading, which is the one outcome worse than reading slowly.

Spend the effort elsewhere. Work on choosing what to read. Preview before you read. Learn when to skim and when to slow down. Those choices save more time than another fifty words per minute ever will.

What the deaf reader evidence really shows

You will find articles claiming that deaf readers, with no inner voice and no training, read above 1,000 words per minute. It is a tidy story and it is not supported.

What the research does show is genuinely interesting. Skilled deaf readers have a wider perceptual span than hearing readers. They skip more words. They go back and re-read less.

And their overall reading rate does not significantly differ from matched hearing readers.

A wider window. Fewer regressions. The same speed. That is the strongest evidence you will find anywhere that eye-level advantages do not buy you reading speed, because the constraint is further back.

How to tell whether the voice is your problem

Before you spend a month fixing something, find out if it is broken.

Measure your speed on ordinary prose you have not read before. Land near 250 words per minute with solid comprehension and you are the average adult reader, with room to move.

Land below 200 and subvocalization is not your first problem. Look at vocabulary, at attention, and at whether the material is simply too hard. Fix those before you touch the inner voice. Our page on reading fluency is the place to start.

Land near 400 and you are already a strong reader. The gains left are small and they are worth less than the time you would spend chasing them.

Then run the second test, which nobody tells you to run. Read a page of something hard, close it, and write down what it said in three sentences. If you cannot, your speed was never the problem. Comprehension was, and the inner voice was the only thing keeping you afloat. Turning it off would have sunk you faster. Our page on how to improve reading comprehension is where to go next.

What actually lifts your speed

Here is the finding the industry buried.

Speed reading courses do sometimes work. The gains are real. They are not produced by the techniques. They are produced by the student reading a great deal of text, week after week, for eight to twelve weeks.

There is no shortcut. Reading a lot is the shortcut.

Stop chasing the span

You will be told that an average reader takes in one word per fixation and a good reader takes in five, and that widening your vision is the big win.

It is false. The eye resolves letters across about 20 characters, and you can identify words only 7 to 8 characters to the right of where you are looking. That is the word you are on, plus the next one. Rayner’s verdict on training peripheral vision to read whole lines in one fixation was flat: “simply biologically impossible.”

The truth about the window is on visual span in reading.

Let the regressions do their job

Even skilled readers send 10 to 15% of their eye movements backwards. Most of those happen because comprehension failed and the reader went back to fetch what they missed.

That is a repair, not a bad habit. Suppress it and you keep the fault and lose the fix. The detail is on reading regressions and eye movements.

Read with a purpose

Decide what you want from a text before you open it. One question is enough. A reader who is hunting for something does not drift, and a reader who does not drift does not lose the thread and go back for it.

The voice quietens on its own when you are busy, because you are too occupied looking for something to narrate.

Skim on purpose

Sometimes you have too much to read and no way through it. Skimming is the answer, and it is a legitimate skill. Rayner’s group called it a reasonable way to cope with the overwhelming amount of text we have to read.

The rule is to know which one you are doing. Skim a report to find the three paragraphs that matter. Then read those three properly, at the speed of understanding, and get them right.

What you must not do is skim and tell yourself you read. That is the trick the courses play, and it is the reason people come out of them convinced they have tripled their speed. They read less of the text and remembered what they already knew. The difference is set out on skimming versus speed reading.

Change gear

Ronald Carver measured this and put numbers on it. Memorising a text runs at about 140 words per minute. Learning it, about 200. Normal reading with full comprehension, about 300.

A good reader moves between those gears without thinking about it. A slow reader has one gear. That choice saves more time than any drill.

The honest ceiling

So where does that leave you.

Normal reading with full comprehension caps out around 300 words per minute. The fastest competent adults reach about 550, and they did not get there with an app. They got there by reading, for years.

What you will not get is silence in your head. The voice stays. It gets quieter and more selective, and on the sentences that matter you will want it back, because that voice is a large part of how you think about what you read.

Reading is a skill, like the piano or touch typing. It rewards weeks of steady work and it punishes shortcuts. Fast early gains fade if you never bed them in. If you want structure, our speed reading techniques page lays out the methods, and the speed reading course gives you the drills in order.

Start by finding out where you actually are. Take the speed reading test, get your number, then decide what is worth fixing.

Sources

Rayner, K., Schotter, E. R., Masson, M. E. J., Potter, M. C., & Treiman, R. (2016). So Much to Read, So Little Time: How Do We Read, and Can Speed Reading Help? Psychological Science in the Public Interest, 17(1), 4–34.

Carver, R. P. (1992). Reading rate: Theory, research, and practical implications. Journal of Reading, 36(2), 84–95.