Website Users' Reading Behaviour

Just when you think you know a little about website visitor's behaviour, a new study comes along and you have to revise your previous thinking. For many years, we have been taking a Nielson USA study into consideration when designing webpages. That study found the website visitors started top left, then ran across and down the website page to the right hand edge; then across and down to the left hand edge. 
In their new eyetracking study, the Nielson Norman Group recorded how 232 users looked at thousands of Web pages. They found that users' main reading behavior was fairly consistent across many different sites and tasks. This dominant reading pattern looks somewhat like an F and has the following three components:

  • Users first read in a horizontal movement, usually across the upper part of the content area. This initial element forms the F's top bar.
  • Next, users move down the page a bit and then read across in a second horizontal movement that typically covers a shorter area than the previous movement. This additional element forms the F's lower bar.
  • Finally, users scan the content's left side in a vertical movement. Sometimes this is a fairly slow and systematic scan that appears as a solid stripe on an eyetracking heatmap. Other times users move faster, creating a spottier heatmap. This last element forms the F's stem.

Obviously, users' scan patterns are not always comprised of exactly three parts. Sometimes users will read across a third part of the content, making the pattern look more like an E than an F. Other times they'll only read across once, making the pattern look like an inverted L (with the crossbar at the top). Generally, however, reading patterns roughly resemble an F, though the distance between the top and lower bar varies.

3 screenshots from Nielsen Norman Group's recent eyetracking study.
f reading pattern eyetracking
Heatmaps from user eyetracking studies of three websites. The areas where users looked the most are colored red; the yellow areas indicate fewer views, followed by the least-viewed blue areas. Gray areas didn't attract any fixations.

The above heatmaps show how users read three different types of Web pages:

  •     an article in the "about us" section of a corporate website (far left)
  •     a product page on an e-commerce site (center)
  • a search engine results page (SERP; far right).

If you focus on the red (most-viewed) areas, all three heatmaps show the expected F pattern. Of course, there are some differences. The F viewing pattern is a rough, general shape rather than a uniform, pixel-perfect behavior.

On the E-commerce Product Page (middle example), the second crossbar of the F is lower than usual because of the intervening product image. Users also allocated significant fixation time to a box in the upper right part of the page where the price and "add to cart" button are found.

On the SERP (right example), the second crossbar of the F is longer than the top crossbar, mainly because the second headline is longer than the first. In this case, both headlines proved equally interesting to users, though users typically read less of the second area they view on a page.

Implications of the F Pattern

The F pattern's implications for Web design are clear and show the importance of following the guidelines for writing for the Web instead of loading print content as is:

  • Users won't read your text thoroughly in a word-by-word manner. Exhaustive reading is rare, especially when prospective customers are conducting their initial research to compile a shortlist of vendors. Yes, some people will read more, but most won't.
  • The first two paragraphs must state the most important information. There's some hope that users will actually read this material, though they'll probably read more of the first paragraph than the second.
  • Start subheads, paragraphs, and bullet points with information-carrying words that users will notice when scanning down the left side of your content in the final stem of their F-behavior. They'll read the third word on a line much less often than the first two words.

So it might be a good time to have a look at the wireframing of your Home Page and your Product Pages to ensure the layout is compatible with the findings of this new study. Or give me a call on 0274 777753 and I will take a look.