Aesthetic-Usability Effect

Illustration for the Aesthetic-Usability Effect: a balanced, polished interface screen with a tiny flaw hidden in it.

Key takeaways

Pleasing visuals make users more forgiving of small flaws.

A beautiful interface can hide usability problems, so that they slip past usability tests.

Origins

The effect was studied in 1995, in the field of human-computer interaction. Masaaki Kurosu and Kaori Kashimura of the Hitachi Design Center had 252 participants rate 26 different ATM interface designs for ease of use and for beauty. Whatever the real usability of each design, the ratings showed a strong link between how attractive people found an interface and how usable they believed it to be. Kurosu and Kashimura concluded that even when users judge an interface by its function, they are strongly influenced by its aesthetics.

Further reading

The illustration is our own, drawn after the idea of this law’s card in Laws of UX by Jon Yablonski.