Overview

The aesthetic-usability effect describes a tendency to perceive visually appealing interfaces as easier to use, even when their appearance doesn't tell us much about how well they actually work.

It’s generally true: we can form impressions of a product before we've even had much chance to use it. Things like layout, typography, colour and visual balance can influence those impressions, including our expectations about how straightforward an experience will be.

The distinction (and tension) is between perceived usability and actual usability. Something can look approachable and still be difficult to navigate, understand or operate.

This matters when people are choosing between services, forming first impressions or evaluating an interface. Positive reactions to visual design can be mistaken for evidence that a product works well. If we don't distinguish those reactions from what people can actually accomplish, we risk overlooking problems.

Of course, aesthetics deserve attention in their own right. Visual appeal is a meaningful part of an experience, but it doesn't establish whether people can successfully use a product.

In practice

Early research by Kurosu and Kashimura examined the relationship between apparent usability and characteristics of interface layouts, and found that aesthetic qualities influenced judgements of usability.[1]

Later, Tractinsky and colleagues investigated an experimental ATM-style interface. They found a strong relationship between perceived aesthetics and usability, both before and after participants used the system.[2]

For product teams, these findings offer a reason to examine first impressions alongside actual interaction. Asking whether people like the look of an interface provides useful information, but it answers a different question from observing whether they can complete tasks, recover from errors or understand what's happening.

You might see that distinction emerge in a few situations:

  • Comparing interfaces: A visually polished option seems easier to use before either option has been tested.
  • Gathering feedback: Participants rate an attractive interface positively despite struggling with parts of a task.
  • Reviewing a redesign: An improved visual presentation changes perceptions of usability, even though the underlying interaction has changed very little.

Evaluating visual appeal and usability together can provide a fuller understanding of an experience, but neither should stand in for the other.

Considerations

The relationship isn't universal

The aesthetic-usability effect shouldn't be treated as a rule that attractive interfaces will always be perceived as more usable.

In a later experiment involving an online shop, Tuch and colleagues found that visual aesthetics did not influence perceived usability. Instead, poor usability negatively affected participants' subsequent ratings of aesthetics, with frustration appearing to contribute to that change.[3]

So... which influences which? It depends. Some research suggests that appearance influences how usable something seems. Other findings suggest that struggling to use something can change how attractive we think it is. The relationship is more complicated than the name of the effect might suggest.

Perceived usability isn't actual usability

A glowing review of an interface's appearance can feel like a win. But what if the same people struggle to find what they're looking for, understand what to do next, or complete a seemingly straightforward task?

It's worth looking beyond first impressions. Task-based evaluation, accessibility assessment and research with people who have different needs and experiences can reveal problems that visual appeal might otherwise overshadow. Visually appealing interfaces can still have inaccessible controls, confusing navigation or nonsensical interactions that leave people stuck.

In short, something that looks good can still be bad.

Aesthetic judgements vary

What people find visually appealing can be shaped by all sorts of things: culture, familiarity, social expectations, personal experience and the context in which they encounter a design. A visual style that feels familiar and appealing to one audience might seem confusing, dated or completely unremarkable to another. And tastes change over time, too. What looks fresh and appealing today might feel dated in a few years, while yesterday's design trends occasionally find their way back into fashion.

Designers should be cautious about treating their own aesthetic preferences as universal, particularly when those preferences conflict with accessibility or the needs of the people using a product.