Why Long Words Make Reading Feel Slower

Introduction

Long words are one of the simplest reasons non-fiction often feels slower to read than fiction. The effect is not dramatic on any single word. Most skilled readers recognise long words quickly. The slowdown appears because hundreds of slightly longer recognition events accumulate across a page. A report filled with terms such as “administrative”, “constitutional”, “pharmacological”, or “macroeconomic” demands more visual and linguistic processing than a page built mainly from short, familiar words. Research on reading rates, eye movements, and text difficulty consistently shows that word length influences how quickly readers move through text and helps explain why non-fiction is often read more slowly than narrative prose. [Sage Journals+2Gwern]journals.sagepub.comSage JournalsImproving reading rate prediction with word length…28 Apr 2021 — The equation predicts that Dutch texts with an average w…

Why Word Length Affects Recognition Speed

Reading is not a process of taking in an entire line at once. The eyes pause briefly on words, gather information, and then jump forward. Word length influences both where the eyes land and how long they stay.

Eye-tracking studies show that longer words are less likely to be skipped and more likely to receive longer fixations than short words. Readers also use information about word length when planning eye movements, meaning that longer words affect the mechanics of reading before they are even fully recognised. [PMC+2PMC]pmc.ncbi.nlm.nih.govEffects of Word Length on Eye Guidance Differ for Young and…by S Li · 2018 · Cited by 42 — Specifically, longer words are more like…

This happens for several reasons:

The result is not a major delay on any single encounter. A skilled adult may spend only a fraction of a second longer processing a longer word. However, when dozens of such words appear on every page, those fractions accumulate into a noticeable reduction in overall reading speed. [PMC]pmc.ncbi.nlm.nih.govby A Pollatsek · 2008 · Cited by 128 — The frequency and length of a word both influence how long people fixate it when silently readi…

How Technical Vocabulary Accumulates Processing Cost

Word length matters most in non-fiction because long words are often tied to specialised vocabulary.

A novel might repeatedly use short, highly familiar words such as “house”, “walk”, “friend”, “door”, or “look”. By contrast, a textbook, research article, policy document, or business report may rely on terms such as “implementation”, “correlation”, “infrastructure”, “methodology”, or “jurisdiction”. These words are not only longer; they are often encountered less frequently in everyday life.

Research on eye movements shows that both word length and word frequency influence fixation time. A long word that is also relatively uncommon typically creates a larger processing burden than a short, highly familiar one. [PMC]pmc.ncbi.nlm.nih.govby A Pollatsek · 2008 · Cited by 128 — The frequency and length of a word both influence how long people fixate it when silently readi…

This interaction helps explain why some non-fiction passages feel unexpectedly dense. Consider a sentence describing a character entering a room compared with a sentence explaining organisational restructuring. The second sentence may contain multiple long abstract nouns and technical modifiers. Even when the concepts are understood, readers must invest slightly more effort in recognising and integrating each term.

Across an entire chapter, that extra effort becomes measurable. Studies that model reading speed have found that average word length significantly improves predictions of how quickly a text will be read. In other words, knowing the typical length of words in a passage provides useful information about its expected reading rate. [Sage Journals]journals.sagepub.comSage JournalsImproving reading rate prediction with word length…28 Apr 2021 — The equation predicts that Dutch texts with an average w…

Why the Slowdown Feels Larger Than It Is

Readers often overestimate how much individual long words affect them. The real mechanism is cumulative rather than dramatic.

Imagine a page containing 500 words. If many of those words require slightly longer fixations and are skipped less often, the reader may spend several additional seconds on that page without consciously noticing any single obstacle. The reading experience simply feels slower and more effortful.

This accumulation effect aligns with broader reading-rate research. Reviews of adult reading speed show that non-fiction is typically read more slowly than fiction, and differences in vocabulary characteristics, including word length, account for a meaningful portion of that gap. [Gwern+2ResearchGate]gwern.netHow many words do we read per minute?A review and…For silent reading of English non-fiction most adults fall in the range of 175–300 wpm; for fiction the range is. 200–320…

Importantly, this does not imply poorer reading ability. A slower pace can be a normal response to the language on the page. The text itself contributes to reading speed.

When Shorter Non-Fiction Can Read Quickly

Not all non-fiction is slowed by long words. Many forms of non-fiction are written with deliberately simple vocabulary and can be read at speeds comparable to fiction.

Examples include:

When authors replace specialised terminology with shorter, familiar alternatives, readers spend less time recognising words and more time following ideas. The result is a smoother reading experience even when the subject matter remains informative.

This is one reason readability guidelines often encourage plain language. Shorter, more familiar words reduce processing demands and allow readers to move through material more efficiently. [Siteimprove]help.siteimprove.com80000447968 readability why are long sentences over 20 wordsReadability: Why are long sentences over 20 words?21 Apr 2022 — Studies from the American Press Institute have shown that when…

What This Means for Increasing Reading Speed

For adults seeking to increase reading speed, word length provides an important reminder: reading rate depends partly on the text, not only on the reader.

A person who reads a novel at 280 words per minute may naturally slow when reading a policy paper packed with long technical terms. That reduction is not necessarily a sign of weaker skill. It reflects the additional recognition work required by the language itself.

Because long words are more likely to attract fixations, resist skipping, and require longer processing times, they create a small but persistent drag on reading speed. In non-fiction, where specialised vocabulary appears repeatedly, those costs accumulate page after page, helping explain why the same reader can move comfortably through fiction yet feel noticeably slower when tackling dense informational prose. [Sage Journals+3PMC+3PMC]pmc.ncbi.nlm.nih.govEffects of Word Length on Eye Guidance Differ for Young and…by S Li · 2018 · Cited by 42 — Specifically, longer words are more like…

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Endnotes

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   A review and...For silent reading of English non-fiction most adults fall in the range of 175–300 wpm; for fiction the range is. 200–320...

2. Source: researchgate.net
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   A review...by M Brysbaert · Cited by 864 — For silent reading of English fiction most adults fall in the range of 175 to 300 wpm; for fi...

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   Skipping rates are largely determined by word length; short words are skipped more than long words.Read more...

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8. Source: help.siteimprove.com
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   Readability: Why are long sentences over 20 words?21 Apr 2022 — Studies from the American Press Institute have shown that when...

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    (PDF) Eye Movements and Word Skipping During ReadingThe results demonstrate that word predictability (due to contextual constraint) and w...

12. Source: journals.sagepub.com
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13. Source: pmc.ncbi.nlm.nih.gov
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    Myth of Normal Reading - PMC - NIHby F Huettig · 2022 · Cited by 28 — The fact that even in published psycholinguistic studies people sho...

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Additional References

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   39 Reading Statistics and Facts You Should KnowCategory, Data; Average Reading Speed, 250-300 words per minute; Average Reading Compreh...

2. Source: thereadingape.com
   Link: https://www.thereadingape.com/single-post/the-eyes-have-it-what-eye-movements-can-tell-us-about-reading-instruction
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   what eye movements can tell us about reading instruction.Feb 25, 2023 — In [oral reading]({{ 'reading-aloud/' | relative_url }}), eyes are generally two words ahead of the voice...

3. Source: bps.org.uk
   Title: most comprehensive review date finds average persons reading speed slower
   Link: https://www.bps.org.uk/research-digest/most-comprehensive-review-date-finds-average-persons-reading-speed-slower
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   Most comprehensive review to date finds the average...13 Jun 2019 — With longer texts, the rates fell more closely around the average, s...

4. Source: biblio.ugent.be
   Title: Ghent University Bibliography How many words do we read per minute?
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   A review and meta...by M Brysbaert · 2019 · Cited by 855 — The average oral reading rate (based on 77 studies and 5965 participants) is...

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   Read Faster Using Science (Use These 3 Tips)What's the Standard Reading Speed? Well, 300 words per minute (wpm). Brysbaert (2019) found t...

7. Source: biorxiv.org
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   May 6, 2026 — The average adult reads 238 words per minute for non-fiction prose, based on Brysbaert's 2019 meta-analysis of 190 studies...

   Published: May 6, 2026

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   in the range of 175 to 300 wpm, with an average...Read more...

10. Source: sites.pitt.edu
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    Movements During ReadingThis finding indicates that, out to about 15 character spaces from fixation, readers use the spaces between words...