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“What is beautiful is usable”: why design shapes how easy a site feels
Users rated a better-looking system as easier to use, even after they had used it. What the Ben-Gurion University study found and why design is not decoration.
Christoph SpeiserProject lead & sales- Published
- Topic
- Websites
- Reading time
- 5 min read
Key takeaways
- Noam Tractinsky and colleagues at Ben-Gurion University tested a simulated cash machine in different designs. The study appeared in 2000 in Interacting with Computers.
- Before use, how beautiful the system looked was closely linked to how easy it seemed to use.
- After use, the design still shaped how easy users found it. How easy it actually was to use had no such effect.
- The study has been cited about 1,400 times and is the basis of what designers call the aesthetic-usability effect.
Short answer: people rate a better-looking system as easier to use. In a study at Ben-Gurion University published in 2000, this held even after participants had used the system. How beautiful the design was shaped their verdict on usability. How easy it actually was to use did not.
What the study tested
Noam Tractinsky, A. S. Katz and D. Ikar built a computer program that worked like a cash machine. They varied how attractive it looked and how easy it was to use. Participants rated beauty and usability before using it and again afterwards.
Before use, the two ratings were closely linked: whatever looked good also seemed easy to use. After use, this link remained. The analysis showed that the design affected how easy users found the system. Its actual usability did not change that verdict. The researchers compare this to social psychology, where attractive people are also judged more favourably on other traits.
The paper appeared in the journal Interacting with Computers and has been cited about 1,400 times. Designers know the result as the aesthetic-usability effect.
What this means for your website
Design is not decoration you add once everything else works. It changes how visitors judge your whole offer: whether your site feels easy, whether your business seems careful, whether they trust you with an enquiry. For small businesses this matters especially, because the website is often the first contact.
- A tidy design forgives small flaws. Visitors are more patient with a site that looks good.
- A dated design costs trust. Even if everything works, an old look makes the site seem harder to use.
- Looks do not replace function. Beauty can hide problems for a while, but a form that does not work still loses the enquiry.
How fast that judgement starts is shown by another classic: visitors form a first impression of a website’s look within 50 milliseconds.
What the study does not say
The study tested a cash machine simulation, not a website, and it is from 2000. Later studies have found the effect again, but not always as strongly. It is therefore not proof that beauty beats function. It shows that people do not judge the two separately.
Does your website look as good as your work?
Send us your URL. We tell you where the design costs trust and what a redesign would change.
Frequently asked questions
What is the aesthetic-usability effect?
People rate a well-designed product as easier to use than a less attractive one, even if both work the same way. The best-known study on this is by Tractinsky, Katz and Ikar (2000).
Is a beautiful website more successful?
The study does not measure sales or enquiries. It shows that design changes how easy and trustworthy a site seems. Whether visitors get in touch also depends on content and offer.
Is function more important than design?
Both count, and visitors do not judge them separately. A beautiful site that does not work loses customers. A working site with a dated look seems harder to use than it is.
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Christoph Speiser, Project lead & sales