Aesthetic-Usability Effect
Users often perceive aesthetically pleasing design as design that’s more usable.
Doherty Threshold
Productivity soars when a computer and its users interact at a pace (<400ms) that ensures that neither has to wait on the other.
Fitts’s Law
The time to acquire a target is a function of the distance to and size of the target.
Goal-Gradient Effect
The tendency to approach a goal increases with proximity to the goal.
Hick’s Law
The time it takes to make a decision increases with the number and complexity of choices.
Jakob’s Law
Users spend most of their time on other sites. This means that users prefer your site to work the same way as all the other sites they already know.
Law of Common Region
Elements tend to be perceived into groups if they are sharing an area with a clearly defined boundary.
Law of Proximity
Objects that are near, or proximate to each other, tend to be grouped together.
Law of Prägnanz
People will perceive and interpret ambiguous or complex images as the simplest form possible, because it is the interpretation that requires the least cognitive effort of us.
Law of Similarity
The human eye tends to perceive similar elements in a design as a complete picture, shape, or group, even if those elements are separated.