Laws of UX

Using Psychology to Design Better Products & Services
Jon Yablonski

Book Notes

Jakob’s Law

Users spend most of their time on other sites, and they prefer your site to work the same way as all the other sites they already know.

Fitts’s Law

The  time to acquire a target is a function of the distance to and size of the target.

Hick’s Law

The time it takes to make a decision increases with the number and complexity of choices available.

Miller’s Law

The average person can keep only 7 (± 2) items in their working memory.

Postel’s Law

Be conservative in what you do, be liberal in what you accept from others.

Peak–End Rule

People judge an experience largely based on how they felt at its peak and at its end, rather than on the total sum or average of every moment of the experience.

Aesthetic–Usability Effect

An aesthetically pleasing design creates a positive response in people’s brains and leads them to believe the design actually works better.

von Restorff Effect

When  multiple  similar  objects  are  present,  the  one  that  differs  from  the rest is most likely to be remembered.

© 2023 Mike Fiorillo
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