Reading while listening: what the research says about audiobooks

By Pavel Kharakh Published October 22, 2026 Updated October 30, 2026

What studies of reading while listening actually found for language learners: vocabulary, comprehension, fluency, the limits, and how to use it well.

We build an app that plays an audiobook while you read the same text, so we have an obvious interest in this method working. That is a good reason to be careful. We went back to the studies people usually cite and read what they measured, how many learners took part and what the authors say about their own limits.

The short version: reading while listening (researchers call it RWL, or audio-assisted reading) helps second-language learners. It helps most with comprehension and listening, and with some vocabulary. It is not magic. One pass through a book teaches you very few new words, and that held across every study we read.

What the research means by "reading while listening"

In these studies, learners read a text while a recording of the same text plays. That is usually a graded reader (a book rewritten for a limited vocabulary) narrated by a native speaker. It is compared with reading silently, with listening only, or with both. Most studies are in English as a foreign language, and most of the participants are university or secondary-school students in East Asia.

The vocabulary studies

Brown, Waring and Donkaewbua (2008)

This is the study everyone cites, and it is open access. Thirty-five Japanese university students at pre-intermediate to intermediate level each met three Oxford Bookworms readers at the 400-headword level. They read one, read and listened to another, and only listened to the third. The narration ran at 93 words per minute. Each book had 28 target words, which the researchers swapped for made-up substitute words so nobody could already know them.

On the strictest test, writing down a word's meaning unprompted straight after the session, learners got 4.39 of the 28 words after reading while listening, 4.10 after reading only and 0.56 after listening only. On a multiple-choice test the numbers were higher: 13.31, 12.54 and 8.20. The difference between reading only and reading while listening was not statistically significant. Listening only was clearly worse than both.

Three months later the unprompted-recall scores were down to about one word per book in either reading mode, and almost none for listening only. The authors called this "a disappointing rate of return considering the effort involved". They add that the multiple-choice scores held up much better, which suggests a lot of partial knowledge that the strict test could not detect. Words that came up more often were more likely to be learned and less likely to be forgotten. The authors suggest that long-term retention probably needs "considerably higher than seven to nine" encounters.

Learners' preferences were clearer than the score differences. In their written feedback, 72% preferred reading while listening, 28% preferred reading only, and nobody clearly preferred listening only. In informal interviews, some said the narrator did the work of breaking the sentences into chunks for them.

Studies that found a reading-while-listening advantage

Webb and Chang (2012) followed 82 Taiwanese learners aged 15 to 16 over two seven-week periods of repeated reading of 28 short texts. Reading with audio led to significantly greater vocabulary knowledge than reading without it.
Webb and Chang (2015) studied 61 Taiwanese learners, some in an extensive reading program with audio and some in a regular coursebook class. After reading and listening to 10 graded readers, relative gains on 100 target words were 44.06%, and 36.66% three months later. How often a word appeared did not significantly predict whether it was learned, and the authors conclude frequency is "perhaps one of many factors".
Teng (2018) compared reading only with reading while listening for 60 Chinese learners on 24 target words. More words were learned in the reading-while-listening condition. Frequency of exposure mattered for word form and grammar, but not for meaning or collocation.
Malone (2018) gave 80 intermediate learners texts with each new word appearing two or four times, with or without audio. Some learning was measurable after just two encounters, and the audio made a difference to how well learners connected a word's form to its meaning.
Vu and Peters (2021) looked at collocations, meaning word pairs like make a decision, with 100 Vietnamese learners over nine weeks. Reading while listening beat reading only, but reading with the target phrases underlined beat both.

Comprehension and listening fluency

Chang and Millett (2014) gave three groups ten graded readers over 13 weeks in one of three modes. The reading-while-listening group showed the most consistent gains in listening fluency, measured by passages played once at a fixed speed.
Chang and Millett (2015) compared audio-assisted and silent extensive reading for beginner learners. Both groups improved reading speed and comprehension, the audio group more so, and the gains held at a three-month delayed test.
Woodall (2010) had basic-level learners at a university in Puerto Rico read Charlotte's Web. The 69 who also listened outscored the 68 who read silently on all eight weekly comprehension quizzes, significantly so on four. Reading-fluency data showed no clear trend.
Gobel and Kano (2014) ran a year-long reading-while-listening program for 230 Japanese first-year students. Reading rate and vocabulary recognition improved significantly, but general proficiency (TOEFL) did not. Many students had negative attitudes toward the program and its software, and that cut how much work they did.
Hui (2024) tested 46 learners at an American university. Reading while listening gave better comprehension than listening only, but no better than reading only.

An eye-tracking study by Conklin and colleagues (2020) adds a detail: readers generally do not look at the word they are hearing, but slightly ahead of it, which the authors suggest may explain some of the benefit.

What the meta-analyses add

Clinton-Lisell (2023) pooled 30 studies (1,945 participants, first- and second-language readers) comparing reading while listening with reading only on comprehension. The overall benefit was small: g = 0.18, which the author calls trivial. It appeared only in studies where the experimenter set the pace (g = 0.41). When readers controlled their own pace, there was no reliable effect (g = 0.06). For second-language vocabulary, the two studies in the sample had large effects, but the author warns that two studies are too few to generalise from.

Webb, Uchihara and Yanagisawa (2023) pooled 24 studies of incidental vocabulary learning with 2,771 participants. Average gains were similar for reading (17% of target words on immediate tests, 15% on delayed tests), listening (15%, 13%) and reading while listening (13%, 17%). Viewing came lower (7%, 5%). But only two of the studies were about reading while listening, so that row of the table rests on very little data.

The honest limits

Small, narrow samples. Most of the studies above had between 35 and 100 learners (the largest, Gobel and Kano, had 230). They were mostly university students in Japan, Taiwan, China or Vietnam, and mostly learning English.
Short exposure. Many studies use one text, or a few, per condition. Brown and colleagues point out that each learner met only about 5,500 words per mode.
Graded readers, not real books. Almost all of the materials were simplified texts or short passages with careful narration. We found little evidence either way on unabridged novels at natural speed.
Words need many encounters. Single books give single-digit gains on strict tests, and those gains fade without more exposure.
The test changes the answer. In Brown and colleagues' study, the same learners scored about three times higher on multiple choice than on unprompted recall.
Listening only is the weakest mode in almost every comparison, at least for learners whose reading is ahead of their listening.

How to use reading while listening well

Pick text you can mostly read already. Brown and colleagues chose books in which 95% or more of the running words were known. If you are tapping every third word, step down a level.
Let the audio set the pace, but not too fast. In the meta-analysis, the comprehension benefit showed up only when readers did not control the pace, which is what happens when the narration sets the speed. If you lose the thread, slow the narration down rather than giving up on it. Brown and colleagues suggest that learners whose listening lags behind their reading should listen at a slower speed or an easier level.
Re-read and re-listen. Repeated reading with audio is where Webb and Chang (2012) found gains. Brown and colleagues suggest a sequence: read a passage, read it again while listening, then listen only.
Read a lot, in the same author or genre. Words have to come back to stick, and staying in one author, series or genre brings them back naturally.
Look up sparingly, then keep what you looked up. Stopping for every word breaks the flow. But in Brown and colleagues' study, most words met in a single book were gone from strict recall three months later, so save the ones that matter.
Review on purpose. Incidental learning gives you a first, fragile trace of a word. Spaced review is how you turn it into a word you actually know.

Where Readuet fits

We built Readuet around this routine. You read an ebook while its audiobook plays, and the sentence being narrated is highlighted. You can press and hold a sentence to go back and hear it again, and change the playback speed. Tapping a word gives a translation in its context. Saved words move along a five-step familiarity scale and come back in FSRS spaced-repetition review. Meeting a saved word again in a book counts as a review too. There is also a free catalog of about 2,700 public-domain books in ten languages, about 1,200 of them with a recording, each tagged with a CEFR level so you can choose one you can actually read. It runs in the browser at app.readuet.com and on iPhone, with Android coming soon. Nothing in the research above was a study of Readuet, so treat it as a tool for applying what the studies found, not as proof.

References

Brown, R., Waring, R., and Donkaewbua, S. (2008). Incidental vocabulary acquisition from reading, reading-while-listening, and listening to stories. Reading in a Foreign Language, 20(2), 136–163. nflrc.hawaii.edu/rfl/item/174
Chang, A. C-S., and Millett, S. (2014). The effect of extensive listening on developing L2 listening fluency: some hard evidence. ELT Journal, 68(1), 31–40. doi:10.1093/elt/cct052
Chang, A. C-S., and Millett, S. (2015). Improving reading rates and comprehension through audio-assisted extensive reading for beginner learners. System, 52, 91–102. doi:10.1016/j.system.2015.05.003
Clinton-Lisell, V. (2023). Does reading while listening to text improve comprehension compared to reading only? A systematic review and meta-analysis. Educational Research: Theory and Practice, 34(3), 133–155. ERIC full text
Conklin, K., Alotaibi, S., Pellicer-Sánchez, A., and Vilkaitė-Lozdienė, L. (2020). What eye-tracking tells us about reading-only and reading-while-listening in a first and second language. Second Language Research, 36(3), 257–276. doi:10.1177/0267658320921496
Gobel, P., and Kano, M. (2014). Implementing a year-long reading while listening program for Japanese university EFL students. Computer Assisted Language Learning, 27(4), 279–293. doi:10.1080/09588221.2013.864314
Hui, B. (2024). Scaffolding comprehension with reading while listening and the role of reading speed and text complexity. The Modern Language Journal, 108(1), 183–200. doi:10.1111/modl.12905
Malone, J. (2018). Incidental vocabulary learning in SLA: Effects of frequency, aural enhancement, and working memory. Studies in Second Language Acquisition, 40(3), 651–675. doi:10.1017/S0272263117000341
Teng, F. (2018). Incidental vocabulary acquisition from reading-only and reading-while-listening: a multi-dimensional approach. Innovation in Language Learning and Teaching, 12(3), 274–288. doi:10.1080/17501229.2016.1203328
Vu, D. V., and Peters, E. (2021). Incidental learning of collocations from meaningful input: A longitudinal study into three reading modes and factors that affect learning. Studies in Second Language Acquisition, 44(3), 685–707. doi:10.1017/S0272263121000462
Webb, S., and Chang, A. C-S. (2012). Vocabulary learning through assisted and unassisted repeated reading. The Canadian Modern Language Review, 68(3), 267–290. doi:10.3138/cmlr.1204.1
Webb, S., and Chang, A. C-S. (2015). Second language vocabulary learning through extensive reading with audio support: How do frequency and distribution of occurrence affect learning? Language Teaching Research, 19(6), 667–686. doi:10.1177/1362168814559800
Webb, S., Uchihara, T., and Yanagisawa, A. (2023). How effective is second language incidental vocabulary learning? A meta-analysis. Language Teaching, 56(2), 161–180. doi:10.1017/S0261444822000507
Woodall, B. (2010). Simultaneous listening and reading in ESL: Helping second language learners read (and enjoy reading) more efficiently. TESOL Journal, 1(2), 186–205. doi:10.5054/tj.2010.220151

Frequently asked questions

Is reading while listening better than just reading?

Sometimes, by a little. For vocabulary, several studies found an advantage for reading while listening, while the best-known one (Brown and colleagues, 2008) found no significant difference from reading alone. For comprehension, a meta-analysis of 30 studies found a small overall benefit, and only in studies where readers did not control the pace. Learners in several studies preferred it, though, and a method you enjoy is one you keep using.

Can I learn a language just by listening to audiobooks?

Listening only was the weakest mode in nearly every comparison we read. In Brown and colleagues' study, learners recalled the meaning of 0.56 of 28 new words after listening only, against about four after either kind of reading. Adding the text makes the speech much easier to follow, especially when your reading is ahead of your listening.

What level should the book be?

Easy enough that you already know almost all the words. The studies mostly used graded readers where about 95% or more of the running words were known. If the book is much harder, you spend your attention decoding instead of following the story, and you won't pick up much vocabulary in passing.

Should I slow the audio down?

If you can't keep up, yes. Brown and colleagues ran their narration at 93 words per minute and recommend that learners whose listening lags behind their reading use a slower speed or an easier text. As you get better, bring the speed back up.

How many times do I need to meet a word to learn it?

More than one book usually gives you. Brown and colleagues estimate that long-term retention probably takes considerably more than seven to nine encounters. Webb and Chang (2015) found that frequency alone did not predict learning. That is why we pair reading with deliberate spaced review rather than relying on exposure alone.