As you read these words, do you have a voice that is essentially saying them in your head? If so, then this is what is referred to as subvocalization, or silent speech. It’s a common reading habit that many people have and is often useful for comprehension, but some claim you can suppress or even eliminate it to improve your reading speed. Is there any truth or value to this claim?

It’s not all in your head

Subvocalization is more than just “thinking” words as you read them. It engages with body parts as well, such as the eyes, lips, throat, tongue, vocal cords, larynx, and jaws. Believe it or not, even when you are “silently” reading, you are still making tiny movements that are similar to those you make in active speech. You just don’t realize it.

In fact, researchers have been able to transcribe materials being silently read by participants by attaching electromagnetic sensors to their speech organs.

Even our brains seem to respond to the act as if they were dealing with actual speech. A study conducted in 2012 found that silent reading activates similar brain regions to those associated with overt speech, like the Broca’s area, which is involved with language prediction.

Why do we have a voice when we read silently?

Although scientists are not completely certain, the current consensus is that subvocalization has several benefits associated with comprehension and memory. For instance, research by Alan Baddeley suggests that our working memory relies on something called a phonological loop, which may relate to subvocalization.

According to this model, we have a passive store in our minds that holds verbal information for a short period of time (a few seconds). This phonological store is responsible for holding onto the sounds of words we hear. In order to learn the words, we then have an “articulatory rehearsal process” that actively processes the sounds we hear and refreshes them in the store by way of subvocal repetition – like silently rehearsing the words to keep them in our memories.

If this model is correct, when we silently read, we convert the written information into a phonological form which allows us to engage with it as if it were spoken information. This puts the words in the same phonological store. In doing so, the phonological loop helps maintain the sequence of words and phrases, so that we can understand their syntactic and semantic structure.  

Is here a bad side to subvocalization? 

Subvocalization is something many people do. It is a common reading habit that is probably developed through the way many of us learn to read – by reading words out loud, slowly. Most deaf people do not subvocalize as they are usually taught to read in a different way, but they do exhibit some form of sub-gesturing/sub-imaging whereby they make small muscle movements with their hands and forearms when reading.

For most of us, subvocalization is an innate aspect of our reading process, but for some, it is regarded as a hindrance.

The argument proposed by advocates of “speed reading” strategies suggests that subvocalization slows down our reading speed. This is because it can trigger hyperfixation, which can interfere with comprehension.

At the same time, subvocalization matches reading speed to the speed of speech. So if the average person can say around 200-250 words per minute, then the average reader will be able to process 200-250 words per minute (less for those who hyper fixate).

But despite some claims by reading gurus who claim it is possible to eliminate subvocalization so you can become a super speed reader, this innate habit is not going anywhere. However, you can limit the influence subvocalization has on your reading through some tricks that can help you speed up, but only to a certain extent. And, I’m afraid, they are not glamorous.

The answer, as with all things, is practice: read more, read more often, and read more widely. Reading skills depend on knowledge of language. The more you read the more you’ll learn about the structure of printed speech. By reading unfamiliar content and words through novel ways we can also expand our knowledge of how texts are put together. Different writers have different styles of writing, just as different genres – fiction or non-fiction – will use different language to express their ideas.

The more we expose ourselves to varied content the easier it will be for us to follow it, comprehend it, and ultimately get through it. As with so many skill-based activities, there are no impressive gimmicky short cuts to become a pro.