The benefits of reading with the strongest evidence are a bigger vocabulary, more general knowledge and better reading itself, and those gains build on each other over years. The evidence also links regular book reading to a longer life and to slower mental decline in old age, and fiction to a small boost in understanding other people. Those links are real but weaker, because most of the studies can show that readers do better, not that reading is the cause.
Most lists of reading benefits stop at the claim. This one grades each benefit by the strength of its evidence, names the study that earned the grade and the gap it left open, and checks two popular claims that are weaker than their reputation.
The benefits of reading at a glance
| Benefit | Best evidence we found | How strong |
|---|---|---|
| Larger vocabulary and more general knowledge | Meta-analysis of 99 studies; studies controlling for ability | Strong, but mostly correlational |
| Better reading and spelling | Same meta-analysis: an “upward spiral” from childhood to college | Strong, mostly correlational |
| Higher later intelligence | Study of 1,890 identical twin pairs | Moderate; not a randomized trial |
| Longer life | 12-year study of 3,635 adults over 50 | Moderate; observational |
| Slower mental decline in old age | Study of 294 older adults with brain autopsies | Moderate; reading was one of many activities |
| Better understanding of others (fiction) | Meta-analysis of 14 experiments | Small effect; one famous study failed to replicate |
| Less stress | Experiment with 22 students | Weak; the popular “68%” figure is not from a journal |
The ratings are our editorial summary of the sections below, not a scale from the studies.
Does reading make you smarter?
It depends on what you mean by smarter. For vocabulary and knowledge the answer is close to yes; for intelligence in general, the evidence points the same way but is less certain.
The best single study is a 2015 paper in Child Development by Ritchie, Bates and Plomin. They followed 1,890 pairs of identical twins born in England and Wales, tested at ages 7, 9, 10, 12 and 16. Identical twins share their genes and their home, so when one twin reads better than the other, genes and family cannot explain the gap. The twin who read better early on went on to score higher on later intelligence tests, and not only on verbal ones. Reading differences at age 12 explained 7% of intelligence differences at 16, and about 13% once the authors corrected for measurement error.
The limits, in the authors’ own words: this is not a randomized experiment, and parents or teachers could have improved both the reading and the later scores without reading itself doing the work. The link was with reading ability: how much the twins read did not predict later intelligence beyond that.
Reading builds vocabulary and knowledge
Here the evidence is broad. A 2011 meta-analysis in Psychological Bulletin by Mol and Bus pooled 99 studies with 7,669 participants, from preschoolers to university students. Leisure reading was moderately to strongly linked with reading comprehension and spelling, and the link grew with age. How much people read explained 12% of the differences in oral language skills among preschool and kindergarten children, 19% in middle school, 30% in high school and 34% among college and university students.
The authors describe an “upward spiral”: good readers read more, and reading more makes them better readers each year. Poor readers also appeared to benefit from reading in their free time. We read this paper as an abstract only, and the studies in it are correlational.
Why reading does this better than conversation or TV comes down to words. In a 1998 article in American Educator, psychologists Anne Cunningham and Keith Stanovich reported counts of rare words (words a fourth to sixth grader would not know) per 1,000 words of text, from data by Hayes and Ahrens (1988):
| Source | Rare words per 1,000 |
|---|---|
| Newspapers | 68.3 |
| Popular magazines | 65.7 |
| Adult books | 52.7 |
| Children’s books | 30.9 |
| Prime-time adult TV shows | 22.7 |
| College graduates talking to friends or spouses | 17.3 |
An adult book offers about three times as many new-word opportunities as a conversation between college graduates. Cunningham and Stanovich also tested the obvious objection, that smart people simply read more. In their study of college students, how much people read still predicted vocabulary, general knowledge, spelling and verbal fluency after reading comprehension and nonverbal ability were taken into account.
If you want the science of what happens in your head as you read, cognitive scientist Daniel Willingham’s The Reading Mind explains it, from how the eyes decode symbols to how the brain builds meaning, and Maryanne Wolf’s Proust and the Squid covers the history and brain science of reading.
Is it true that people who read books live longer?
There is evidence for it, with a large caveat. A 2016 study in Social Science & Medicine by Bavishi, Slade and Levy followed 3,635 Americans over 50 from the national Health and Retirement Study for up to 12 years. During follow-up, 33% of people who read no books died, compared with 27% of book readers. After the authors adjusted for age, sex, race, education, health, wealth, marital status and depression, book readers still had a 20% lower risk of dying. In the unadjusted data, book readers lived 23 months longer at the point where a fifth of each group had died; after the adjustments, that gap shrank to about 4 months.
Three details matter. First, the advantage grew with dose: people reading 3.5 hours or more a week did best. Second, books beat newspapers and magazines, which the authors link to the deeper, slower thinking that books ask of you. Third, in the authors’ analysis, scores on thinking skills (cognition) fully accounted for the link.
What the study cannot show is cause. People who read books may differ in ways the adjustments missed. The participants were over 50, and the authors note that most book readers in the US read fiction, so most of the readers studied were probably reading novels. The authors list nonfiction versus fiction, and e-books and audiobooks, as open questions.
The Live Longer goal collects books on healthy aging if this is your reason to read.
Reading and an aging brain
A 2013 study in Neurology by Wilson and colleagues followed older adults with yearly memory and thinking tests for an average of 5.8 years. After 294 of them died, researchers examined their brains for the damage behind dementia. People who had done more mentally stimulating activities, a list that included reading books, visiting a library and writing letters, declined more slowly, even with the same amount of brain damage. Early-life and late-life activity together explained 14% of the differences in decline that brain damage did not explain.
The limit: reading was one activity among many, rated by the participants themselves (partly from memory), so the study supports staying mentally active in general rather than reading alone.
Does reading fiction make you more empathetic?
This is the most debated benefit. In 2013, a paper in Science by Kidd and Castano reported five experiments in which reading a short piece of literary fiction improved people’s scores on tests of understanding others’ thoughts and feelings (theory of mind), compared with nonfiction, popular fiction or no reading.
A 2016 replication in the Journal of Personality and Social Psychology by Panero and colleagues, run by three independent research groups with 792 participants, found no advantage for literary fiction over the other conditions. The original authors disputed the replication’s methods, and the replication team replied that even the reanalysis did not reproduce the original pattern.
The best summary is a 2018 meta-analysis in the Journal of Experimental Psychology: General by Dodell-Feder and Tamir: 53 effect sizes from 14 studies. Reading fiction, compared with nonfiction or nothing, caused a small but statistically reliable improvement in social understanding (g = 0.15 to 0.16, a small effect). The authors call for research on whether it carries over into real social life.
So fiction may make you slightly better at reading people, on a test, right after reading. For why stories have such a hold on us, Jonathan Gottschall’s The Storytelling Animal makes the case that humans are built for narrative.
Does reading reduce stress?
You will often read that six minutes of reading cuts stress by 68%. The page that ranked first on Google for “benefits of reading” when we checked in October 2026 repeats it without a source. Where the figure is credited, it is to a 2009 report called Galaxy Stress Research by David Lewis of Mindlab International, as in this Newcastle University blog post, not to a journal article. We could not find a published paper with its methods, so we do not use the number.
The best direct test we found is small. In a 2009 study in the Journal of College Teaching & Learning, Rizzolo and colleagues had 22 health science graduate students do 30-minute sessions of yoga, humor and reading, in a randomized order. All three lowered blood pressure and heart rate by similar amounts, and none changed the students’ self-rated stress. The study compared the three activities with each other, not with doing nothing.
Our reading of it: a quiet half hour with a book is a reasonable way to unwind, and so are other calm activities. The Reduce Stress goal has the books on stress itself, and if the stress comes from thoughts that will not switch off, our guide on how to stop overthinking covers the techniques with research behind them.
Starting young: reading for pleasure in childhood
A 2023 study in Psychological Medicine by Sun and colleagues used data on more than 10,000 young US adolescents. Children who had started reading for pleasure early, and kept it up, scored higher on thinking tests, had fewer mental health problems and had moderately larger brain areas linked to those scores, after accounting for socioeconomic status. About 12 hours a week of reading for pleasure looked best for thinking skills. A genetic method called Mendelian randomization pointed toward a causal effect, but most of the analyses are still observational.
Why is reading important now?
Because fewer people do it. A 2025 analysis in iScience by Bone and colleagues used 20 years of the American Time Use Survey, 236,270 people in all. The share of Americans who read for pleasure on a given day peaked at 28% in 2004 and fell to 16% in 2023, a decline of about 3% a year, with widening gaps by education and income.
Adult reading skills are slipping too. According to the National Center for Education Statistics (NCES), the share of US adults at the lowest literacy level (Level 1 or below) rose from 19% in 2017 to 28% in 2023; our piece on the role of education in modern society puts that in the wider picture of adult skills. If reading builds vocabulary and knowledge in an upward spiral, the reverse spiral is the risk.
Does it matter how you read?
For informational texts, paper still has an edge. A 2018 meta-analysis in Educational Research Review by Delgado and colleagues pooled 54 studies with 171,055 participants. People understood texts better on paper than on screens (g = -0.21, a small effect). The gap was larger under time pressure, held for informational texts but not for stories, and grew over the years studied.
Maryanne Wolf’s Reader, Come Home is a book-length version of that worry. Listening is a separate question, which we cover in audiobooks vs reading: for understanding the gist of nonfiction, adults in the studies did about as well listening as reading. To keep what you read, see our guide on how to remember what you read.
How to get the benefits
This list adds no new findings; it applies the ones above.
- Read books, not only feeds. The longevity study found books beat newspapers and magazines, and adult books carry far more new words than talk or TV.
- Read regularly. Most of the benefits above come from reading habits measured over years, not from one session.
- Mix in fiction. The empathy effect is small, but it comes from experiments rather than surveys, and fiction is probably what most readers in the longevity study were reading.
- Use paper for hard informational reading, especially when you are short on time.
- Choose well. Time is the limit for most adults, so pick the books worth your hours. Thomas C. Foster’s How to Read Literature Like a Professor helps you get more from the fiction you do read, and our list of the best nonfiction books is a place to start on nonfiction.
Quick answers
What are the benefits of reading?
The best-supported are a larger vocabulary, more general knowledge and stronger reading skills. Regular book reading is also linked to higher later intelligence, a longer life and slower mental decline, and fiction to a small gain in understanding others.
Why is reading important?
It is one of the main ways adults keep learning new words and ideas after school, and fewer people do it: daily reading for pleasure in the US fell from 28% in 2004 to 16% in 2023.
Does reading make you smarter?
It makes you more knowledgeable and gives you a bigger vocabulary. A study of identical twins found that the twin who read better went on to score higher on intelligence tests, which suggests reading helps, though it is not proof.
Do people who read books live longer?
In one 12-year study of Americans over 50, book readers had a 20% lower risk of dying than non-readers after adjusting for health, wealth and education. It shows a link, not proof that reading is the cause.
Studies cited
- Bavishi, A., Slade, M. D., & Levy, B. R. (2016). A chapter a day: Association of book reading with longevity. Social Science & Medicine, 164, 44-48.
- Bone, J. K., Bu, F., Sonke, J. K., & Fancourt, D. (2025). The decline in reading for pleasure over 20 years of the American Time Use Survey. iScience, 28(9), 113288.
- Cunningham, A. E., & Stanovich, K. E. (1998). What reading does for the mind. American Educator, 22, 8-15.
- Delgado, P., Vargas, C., Ackerman, R., & Salmerón, L. (2018). Don’t throw away your printed books: A meta-analysis on the effects of reading media on reading comprehension. Educational Research Review, 25, 23-38.
- Dodell-Feder, D., & Tamir, D. I. (2018). Fiction reading has a small positive impact on social cognition: A meta-analysis. Journal of Experimental Psychology: General, 147(11), 1713-1727.
- Kidd, D. C., & Castano, E. (2013). Reading literary fiction improves theory of mind. Science, 342(6156), 377-380.
- Mol, S. E., & Bus, A. G. (2011). To read or not to read: a meta-analysis of print exposure from infancy to early adulthood. Psychological Bulletin, 137(2), 267-296.
- National Center for Education Statistics. Highlights of U.S. National Results, 2023.
- Panero, M. E., Weisberg, D. S., Black, J., Goldstein, T. R., Barnes, J. L., Brownell, H., & Winner, E. (2016). Does reading a single passage of literary fiction really improve theory of mind? An attempt at replication. Journal of Personality and Social Psychology, 111(5), e46-e54.
- Ritchie, S. J., Bates, T. C., & Plomin, R. (2015). Does learning to read improve intelligence? A longitudinal multivariate analysis in identical twins from age 7 to 16. Child Development, 86(1), 23-36.
- Rizzolo, D., Zipp, G. P., Stiskal, D., & Simpkins, S. (2009). Stress management strategies for students: The immediate effects of yoga, humor, and reading on stress. Journal of College Teaching & Learning, 6(8).
- Sun, Y.-J., Sahakian, B. J., Langley, C., Yang, A., Jiang, Y., Kang, J., Zhao, X., Li, C., Cheng, W., & Feng, J. (2024). Early-initiated childhood reading for pleasure: associations with better cognitive performance, mental well-being and brain structure in young adolescence. Psychological Medicine, 54(2), 359-373.
- Wilson, R. S., Boyle, P. A., Yu, L., Barnes, L. L., Schneider, J. A., & Bennett, D. A. (2013). Life-span cognitive activity, neuropathologic burden, and cognitive aging. Neurology, 81(4), 314-321.
How BookBits fits
A BookBits audio summary is not the reading these studies measured: it is a quick way to take in a book’s main ideas and decide which books deserve your reading hours, and it supports reading the book rather than replacing it. Previews are free on the website with no account, full listening requires the iOS or Android app, and Pricing starts with a 7-day free trial, then ฿99 a month or ฿990 a year. The Learn Faster and Understand the World goals are good places to start.
