Usability and user experience (UX) design apply cognitive psychology principles to create products and systems that people can use effectively, efficiently, and with satisfaction. Usability focuses on whether users can accomplish their goals (effectiveness), how much effort it requires (efficiency), and how many errors occur (error rate). UX encompasses the broader experience including emotional responses, aesthetic judgments, and overall satisfaction. Both draw heavily on cognitive psychology research.
Key Structures
- Prefrontal cortex (decision making, planning) — The anterior portion of the frontal lobe, critical for executive functions including planning, decision-making, working memory, and cognitive control.
- Visual cortex (layout processing) — The regions of the occipital lobe dedicated to processing visual information through a hierarchy of increasingly complex feature representations, particularly in relation to layout processing.
- Orbitofrontal cortex (aesthetic judgment) — The ventral prefrontal region critical for representing reward value, evaluating outcomes, and guiding adaptive decision making, particularly in relation to aesthetic judgment.
- Hippocampus (navigation) — A medial temporal lobe structure essential for the formation of new declarative memories and spatial navigation — one of the most studied structures in cognitive neuroscience.
- Procedural Memory — The implicit memory system for skills, habits, and motor sequences — knowledge expressed through performance rather than conscious recollection.
- Recognition — A form of memory retrieval in which a previously encountered item is identified as familiar when presented again, typically easier than recall because the target item itself serves as a retrieval cue.
- Mental Models — Internal representations of external reality that people use to reason, predict, and explain — structuring understanding of how things work in the world.
- Ergonomics — The science of designing systems, products, and environments to fit human physical and cognitive capabilities — optimizing performance, safety, and well-being.
- Recall — A form of memory retrieval in which previously learned information must be produced from memory without the item being physically present as a cue.
Key Functions
- Applies cognitive psychology principles to evaluate and design products and systems that are effective, efficient, and satisfying for users.
- includes heuristic evaluation and user testing.
Cognitive Principles in Design
Recognition over recall: interfaces should present options for users to recognize rather than requiring them to remember commands (menus over command lines). Consistency: similar actions should produce similar results, leveraging procedural memory and reducing learning demands. Feedback: systems should provide immediate, clear feedback about the effects of user actions, supporting the action-perception cycle. Progressive disclosure: presenting information in layers of increasing detail manages cognitive load. Chunking: grouping related information helps users organize and remember interface elements.
Cognitive psychology research methods are central to UX: think-aloud protocols reveal users' mental models and confusion points; eye tracking shows where attention is directed and what is missed; A/B testing provides controlled experimental evidence for design decisions; cognitive walkthroughs simulate the problem-solving process users follow; card sorting reveals how users categorize information (informing information architecture); and surveys measure subjective satisfaction and perceived ease of use.
Cognitive Ergonomics
Cognitive ergonomics extends usability to high-stakes domains (aviation, medicine, nuclear power) where interface failures can have catastrophic consequences. It addresses situation awareness, decision support systems, alarm design, and error-resistant interface design. The Swiss cheese model of error analysis recognizes that catastrophic failures result from the alignment of multiple system weaknesses, and interface design is a critical layer of defense.