Text to speech helps you study when you follow the words on screen and stop every few pages to recall what you heard. Listening on its own is no better than reading, and it’s where minds wander most.

That’s the short version of six studies. Here is what each one found, and what it means for how you study, whatever reader you use.

• No shortcutListening instead of readingSame understanding as reading, and more drifting
• HelpsRead-aloud for readers who struggle with printA small but real gain across 22 studies
• Helps mostStopping to recall between sectionsHalf the mind wandering, and more learned
• HelpsChecking what you missedRecall plus the right answers did best

1. Listening alone isn’t a shortcut

Rogowsky, Calhoun & Tallal, 2016 · Varao Sousa, Carriere & Smilek, 2013

In one study, 91 people took in the same nonfiction chapter as an audiobook, as text, or both at once. Their comprehension came out the same in all three, right away and two weeks later. In another, more than 200 people read passages silently, read them aloud, or listened to someone else read. Listening was where their minds wandered most, about half the times they were asked, and it left them remembering the least.

What to do with it: if you use text to speech, keep the words in front of you and follow along. Save eyes-closed listening for a second pass.

2. For readers who struggle with print, it helps

Wood, Moxley, Tighe & Wagner, 2018, a review of 22 studies

Pooling 22 studies of students with reading disabilities, the authors found that having text read aloud, by a computer or a person, improved reading comprehension. The gain was small but real, and it didn’t depend on grade level.

What to do with it: if getting through the words is the hard part, having them read to you is worth trying, and the evidence is on your side.

3. Stopping to recall cuts the drifting

Szpunar, Khan & Schacter, 2013 · Roediger & Karpicke, 2006

Students watched a 21-minute lecture in four parts. Some answered a short quiz after every part; the others didn’t. The quizzed group’s minds wandered on about one check in five, against about two in five for everyone else, and they took more notes and scored higher on the final test. In the older study, students who recalled a passage instead of rereading it remembered more a week later, even though rereading felt like it was working better.

What to do with it: break your reading at the headings. At each one, look away and write down what you remember before you go on.

4. Checking what you missed locks it in

Kang, McDermott & Roediger, 2007

Students read journal articles, then reviewed them in different ways. Writing short answers from memory and then seeing the correct ones was the strongest of the ways they tried, three days later.

What to do with it: after you write what you remember, compare it with the page and fill in what you left out. The gaps are what you study next.

Where Hearald fits

The note and check are part of the Study Kit, and your first three notes are free. Nobody has studied Hearald itself: it’s built on these findings, not proof of them.

What these studies don’t tell you

• Most were short sessions, not a semester of studying.
• The quiz study used a video lecture, not reading. The idea carries over, but it wasn’t tested on a textbook.
• None of them measured word-by-word highlighting on its own.
• In the first study, reading and listening together wasn’t better than either one alone. The gain in finding 2 is for people who struggle with print.

Check yourself

Finding 3, used on this page: answer from memory, then open the answers.

1. In the 2013 lecture study, about how often did the quizzed students’ minds wander, compared with everyone else?
2. Which readers did the review of 22 studies find text to speech helps?
3. You listen to a chapter on a walk, eyes off the text, and feel like you got it. What do these studies say the risk is, and what would you add?

Try it

If you want text to speech that keeps the words in front of you and gives you a place to stop and recall, give Hearald a shot and put it in your browser.

Add Hearald to Chrome — free

Google Docs reads a document out loud only on a paid Google plan. On a free account, the quickest way is the text-to-speech already built into your computer, or a free read-aloud extension in Chrome.

Knowing that up front saves most people half an hour, because the first thing everyone finds is the Accessibility menu, and it makes no sound on its own.

What Google Docs does on its own

Checked October 2026 on Google Docs in Chrome for Windows, Mac and ChromeOS. Two things inside Docs look like read-aloud, and only one of them is.

The first is the Accessibility menu. Tools → Accessibility settings → Turn on screen reader support adds an Accessibility menu with a “Verbalize to screen reader” option. That option hands the selected text to a screen reader that is already running, such as ChromeVox on a Chromebook, VoiceOver on a Mac or NVDA on Windows. If no screen reader is running, nothing plays. That is the trap most guides walk you into.

The second is newer: Tools → Audio → Listen to this tab. It reads the document in a chosen voice with speed control, and it is a Gemini feature: Google’s help page says it needs an eligible Google Workspace or Google AI plan, so it is missing on a plain free Gmail account. If you see Audio under Tools, you have it. If you don’t, you don’t.

The free way, on any account

1. On a Chromebook, open Settings → Accessibility → Text-to-Speech and turn on Select-to-speak. Then hold the Search key and drag over the text in the Doc, or highlight it and press Search + S. Nothing to install.
2. On a Mac, open System Settings → Accessibility → Spoken Content and turn on Speak selection. Select text in the Doc and press Option + Esc.
3. On Windows, or if you want a play button, a voice you choose and word highlighting instead of one selection at a time, add a read-aloud extension from the Chrome Web Store. Free options include Read Aloud, NaturalReader’s free tier and Hearald.
4. Open the document at docs.google.com, click the extension’s icon in the toolbar and press play. Most let you change the voice and speed in the same menu.

Do it in Hearald

1. Add Hearald from the Chrome Web Store. It’s free.
2. Open your document at docs.google.com and click the Hearald icon. Google Docs draws its words as pictures rather than text, so Hearald fetches the Doc’s plain-text copy through your own signed-in session and opens it in its own reading view.
3. Pick a voice. It runs on your own computer, so nothing in the document is sent anywhere, and it works offline.
4. Press play. Each word is highlighted as it’s spoken, which keeps your eyes moving with the voice instead of drifting to another tab.
5. When you finish a section, pause and write down what you remember in Hearald’s note. The check then lists the section’s key points and shows which ones your note missed. The note and the check are part of the Study Kit, and your first three notes are free to try.

Where people get it wrong

The usual sequence goes like this: search for Google Docs read aloud, find the Accessibility menu, turn on screen reader support, click Verbalize selection, hear silence, and decide Docs is broken or the speakers are muted. Neither is true. That menu is a bridge to a screen reader, and on a normal setup there is no screen reader on the other end. The second mistake is seeing Tools → Audio on a work account at the office, going home to a personal Gmail and not finding it. Same product, different plan. On a free account, your computer’s speak-selection feature or an extension is the whole answer.

Recall check

Three questions. Answer them out loud before you open the answers.

1. Which Google Docs menu needs a screen reader running before it makes any sound?
2. On a free Google account, what are the two ways to have a Doc read aloud without paying?
3. You turn on screen reader support, select a paragraph, choose Verbalize selection and hear nothing. Your volume is up. What happened, and what is the quickest fix?

Try it

If your notes, study guides or shared class documents live in Google Docs, give Hearald a shot and put it in your browser.

Add Hearald to Chrome — free

Chrome has no built-in button that reads a PDF out loud on a computer. You add a free read-aloud extension, give it permission to open saved files once, and then any PDF in a Chrome tab becomes something you can listen to while the words highlight on screen.

Below is the general way to do it with any extension, then the same thing in Hearald, which adds a step most readers skip: checking whether you remember what you just heard.

What Chrome can and can’t do on its own

Chrome’s own Reading mode and “Listen to this page” work on web articles, and the Android app can read some pages aloud, but neither one handles a PDF you’ve opened on a laptop. Checked October 2026 on Chrome for Windows and Mac. If you’re on Microsoft Edge instead, Edge’s PDF viewer has a Read aloud button in the toolbar and you don’t need anything else.

So on Chrome the answer is an extension. Here’s the method that works with any of them.

The general method (any read-aloud extension)

1. Open the Chrome Web Store and add a read-aloud extension. Free options with good reputations include Read Aloud (the orange megaphone icon), NaturalReader’s free tier, and Hearald.
2. If the PDF is a file saved on your computer rather than one on a website, go to chrome://extensions, click Details under the extension, and turn on Allow access to file URLs. Chrome blocks extensions from local files until you do this. You only do it once.
3. Open the PDF in a Chrome tab. Drag the file onto Chrome, or right-click it and choose Open with → Google Chrome.
4. Click the extension’s icon in the toolbar and press play. Most let you pick a voice and speed from the same menu.

Do it in Hearald

1. Add Hearald from the Chrome Web Store. It’s free.
2. For saved files, do the one-time Allow access to file URLs step above.
3. Open the PDF in a tab and click the Hearald icon.
4. Press play. Hearald uses a voice that runs on your own computer, so nothing in the PDF is sent anywhere, and it works offline. Each word is highlighted as it’s spoken, which is what keeps your eyes on the page instead of drifting.
5. When you finish a section, pause and write down what you remember in Hearald’s note. The check then lists the section’s key points and shows which ones your note missed. That last part is the difference between hearing a chapter and knowing it. The note and the check are part of the Study Kit, and your first three notes are free to try.

Where people get it wrong

The most common mistake is installing an extension, opening a PDF from the Downloads folder, and concluding the extension is broken when it does nothing. It isn’t broken; Chrome hasn’t let it see local files yet. The Allow access to file URLs switch fixes it in ten seconds. The second mistake is expecting read-aloud to help with a scanned textbook. If you can’t select the text with your mouse, there’s no text to read, and you need OCR first.

Recall check

Three questions. Answer them out loud before you open the answers.

1. Does Chrome on a laptop have a built-in way to read a PDF aloud?
2. What setting do you have to turn on before an extension can read a PDF saved on your computer?
3. You open a scanned PDF, the extension plays nothing, and the file-access setting is already on. What’s the problem, and what fixes it?

Try it

If you read a lot of PDFs for school or certification study, give Hearald a shot and put it in your browser.

Add Hearald to Chrome — free