User Experience
Cognitive Load
Plain English
How much thinking a user has to do to use something.
Definition
Cognitive load is the amount of mental effort required for a user to understand and interact with a product. High cognitive load makes tasks harder, slower, and more error-prone.
In practice
Used to simplify glossaryInterfaceAn interface is the point of interaction between a user and a system, where inputs are made and outputs are received. It can be visual, physical, or conversational.Open glossary term, reduce choices, and present information in manageable ways to make glossaryInteractionInteraction refers to any action a user takes within a product and how the system responds. It includes clicks, taps, gestures, and inputs that drive the user experience.Open glossary term easier.
In context
It is why a form that fits on one screen can still feel harder than three short ones. The count of decisions matters more than the count of screens.
The reality
Users don’t read everything - they scan and guess. If your design demands too much thinking, it will fail.
Compared with
Cognitive Load vs Friction
glossaryFrictionFriction refers to anything that slows users down or makes it harder for them to complete a task. It can be caused by poor design, unnecessary steps, unclear messaging, or technical issues.Open glossary term is effort in doing. Cognitive load is effort in understanding. A single-click action can carry high cognitive load if the user cannot work out what it will do.
FAQ
Common questions
A few practical answers to the questions that usually come up around this term.
What is cognitive load?
It is the mental effort required to use a product or understand information.
Why is cognitive load important?
Lower cognitive load makes products easier and faster to use.
What increases cognitive load?
Complex glossaryLayoutLayout is the arrangement of elements on a page or screen, determining how content is organised and presented. It influences readability, usability, and overall experience.Open glossary term, too many options, and unclear information.
How do you reduce cognitive load?
By simplifying design, reducing choices, and improving glossaryClarityClarity is how easily users can understand what is happening and what they need to do.Open glossary term.
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