Heuristic
Aesthetic-Usability Effect
Users often perceive aesthetically pleasing design as design that's more usable.
Laws of UX
Laws of UX brings together 30 foundational principles from psychology, cognitive science, and behavioral economics to make digital experiences more intuitive, humane, and effective. Each law distills proven research into clear, actionable patterns you can plug directly into your design process.
Heuristic5 laws
Broad rules of thumb for usability that help identify common design problems.
Heuristic
Jakob's Law
Users spend most of their time on other sites. They prefer your site to work the same way.
Heuristic
Doherty Threshold
Productivity soars when a computer and its users interact at a pace (<400ms) that ensures neither has to wait.
Heuristic
Miller's Law
The average person can only keep 7 (±2) items in their working memory at a time.
Heuristic
Tesler's Law
For any system there is a certain amount of complexity which cannot be reduced.
Principle8 laws
Fundamental concepts that guide effective user interface design.
Principle
Fitts's Law
The time to acquire a target is a function of the distance to and size of the target.
Principle
Hick's Law
The time it takes to make a decision increases with the number and complexity of choices.
Principle
Occam's Razor
Among competing hypotheses that predict equally well, choose the one with the fewest assumptions.
Principle
Pareto Principle
Roughly 80% of the effects come from 20% of the causes.
Principle
Parkinson's Law
Any task will inflate until all of the available time is spent.
Principle
Postel's Law
Be liberal in what you accept, and conservative in what you send.
Principle
Peak-End Rule
People judge an experience largely based on how they felt at its peak and at its end.
Principle
Goal-Gradient Effect
The tendency to approach a goal increases with proximity to the goal.
Gestalt6 laws
Psychology principles describing how humans perceive visual elements as unified wholes.
Gestalt
Law of Proximity
Objects that are near, or proximate to each other, tend to be grouped together.
Gestalt
Law of Similarity
The human eye tends to perceive similar elements in a design as a complete picture, shape, or group.
Gestalt
Law of Common Region
Elements tend to be perceived into groups if they are sharing an area with a clearly defined boundary.
Gestalt
Law of Prägnanz
People will perceive and interpret ambiguous or complex images as the simplest form possible.
Gestalt
Law of Closure
When seeing a complex arrangement of elements, we tend to look for a single, recognizable pattern.
Gestalt
Law of Uniform Connectedness
Elements that are visually connected are perceived as more related than elements with no connection.
Cognitive Bias7 laws
Systematic patterns of deviation from rationality in judgment and decision-making.
Cognitive Bias
Von Restorff Effect
When multiple similar objects are present, the one that differs from the rest is most likely to be remembered.
Cognitive Bias
Serial Position Effect
Users have a propensity to best remember the first and last items in a series.
Cognitive Bias
Cognitive Load
The total amount of mental effort being used in working memory impacts understanding and retention.
Cognitive Bias
Zeigarnik Effect
People remember uncompleted or interrupted tasks better than completed tasks.
Cognitive Bias
Anchoring Bias
Users rely heavily on the first piece of information seen when making decisions.
Cognitive Bias
Framing Effect
Decisions are influenced by how information is presented, rather than the information itself.
Cognitive Bias
Confirmation Bias
People favor information that confirms or strengthens their existing beliefs.
Others4 laws
Additional UX considerations that enhance the overall user experience.
Others
Progressive Disclosure
A design strategy that sequences information and actions across several screens to reduce complexity.
Others
Feedback Loops
Clear and immediate feedback helps users understand the results of their actions.
Others
Accessibility First
Design for inclusivity by ensuring products are usable by people of all abilities.
Others
Ubiquity Effect
Experiences should be consistent across all platforms and devices users interact with.