Jon Yablonski

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.

Users will transfer expectations they have built around one familiar product to another that appears similar.

In other words, the less mental energy users have to spend learning an interface, the more they can dedicate to achieving their objectives.

A mental model is what we think we know about a system, especially about how it works.

The task of shrinking the gap between our own mental models and those of the users is one of the biggest challenges we face, and to achieve this goal we use a variety of methods: user interviews, personas, journey maps, empathy maps, and more.

It’s an effective design because it builds on our preexisting mental model of a car seat and then matches the controls to that mental model.

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

as the size of an object increases, the time to select it goes down

The opposite is true as well: the smaller and further away an object is, the more time it takes to accurately select it.

When the space between elements is too small, the likelihood of touch target errors increases.