12 PRINCIPLES OF
COGNITIVE PSYCHOLOGY
APPLIED TO
UX DESIGN
How the human mind works and how to use this knowledge to design more intuitive, user-friendly, and persuasive digital products.
AN OVERVIEW
Each principle represents a fundamental aspect of how humans process information and interact with digital interfaces.
We Perceive What We Expect
Influence of expectations
Users interpret interfaces based on past experiences, affecting perception accuracy.
Visual consistency
Consistent visual design aligns interfaces with user expectations, improving usability.
The role of context
Presentation context influences how users interpret information and interface elements.
Designing for goals
Anticipating user goals helps create intuitive navigation and clearer interfaces.
Our Vision is Optimized for Structure
Pattern recognition
Human vision naturally identifies patterns and groups similar elements to perceive structure.
Gestalt principles
Proximity, similarity, continuity, and closure guide visual organization in design.
Visual hierarchy
Visual hierarchy helps quickly identify important information, improving readability.
We Seek and Use Structures
Well-defined structures
Lists, tables, and groupings organize information and facilitate user navigation.
Reducing cognitive load
Clear structures prevent confusion and reduce cognitive effort during interaction.
Hierarchy and accessibility
Visual hierarchy and grouping improve experience and support accessibility.
Reading is Not Natural
Reading as a learned skill
Reading is an acquired skill, influenced by structure, context, and familiarity.
Impact of design
Excessive text, poor fonts, and low contrast make reading difficult and degrade the experience.
Design for legibility
Legible fonts, proper spacing, and clear organization are essential.
Visual aids
Images and icons complement text and improve accessibility in digital contexts.
Our Color Perception is Limited
Individual variation
Color perception varies among people and can be affected by color blindness.
Contrast sensitivity
Eyes are more sensitive to contrast. High contrast colors are essential for readability.
Accessible colors
Avoid subtle tones and use redundant elements to support color-coded information.
Saturation and brightness
Effective color distinction requires a balance between saturation, brightness, and intensity.
Our Peripheral Vision is Poor, but Smart
Motion detection
Peripheral vision detects movements and changes but lacks sensitivity for details.
Notification positioning
Error messages should be positioned to facilitate perception outside the central focus.
Subtle animations
Subtle animations and color changes guide the eye without causing sensory overload.
Spatial orientation
Peripheral vision helps users maintain orientation, improving navigation.
Attention is Limited and Memory is Imperfect
Limited human attention
Attention cannot focus on many items at once — careful design is essential.
Volatile short-term memory
Interfaces should never rely on users memorizing information between screens.
Design for visibility
Keep system status always visible to reduce cognitive load and errors.
Immediate feedback
Feedback after actions helps reinforce memory and guides next steps.
Limits in Attention, Thought and Action
Goal focus
Users focus on goals, preferring familiar and known workflows.
Guided interface
Progress indicators, task lists, and visual confirmations guide the user.
Cognitive cycle
Design must support: goal setting, execution, and evaluation.
Anticipate behaviors
Anticipate common actions and assist with incomplete tasks to reduce errors.
Recognizing is Easy, Recalling is Hard
Recognition over recall
Recognizing is simpler than retrieving from memory — it should be prioritized in design.
Visual elements as anchors
Icons, thumbnails, and history logs help users identify options without memorizing.
Design for accessibility
Focusing on recognition reduces cognitive load and improves accessibility for everyone.
Learning from Experience is Easy, Problem Solving is Hard
Learning by repetition
Users learn better through repetition and direct experience than through abstract problems.
Predictable interfaces
Consistent interfaces with familiar vocabulary facilitate learning.
Error recovery
Design should support learning from mistakes, with clear feedback and easy reversal.
Factors Affecting Learning
Simplified tasks
Simple tasks with action-oriented vocabulary reduce errors and facilitate learning.
Design consistency
Consistent visual and functional design supports memorization and mental models.
Support tools
Tutorials, contextual tips, and practical examples improve assimilation.
Cognitive design
Design that respects cognitive factors promotes autonomy and confidence in the system.
We Have Time Limits
Interface speed
Interfaces must be fast and responsive to meet users time constraints.
Progress indicators
Progress bars and time estimates help manage expectations.
Minimum effort
Designs that minimize effort increase productivity and user satisfaction.