Why are consistent design patterns important in UI design?

• A. Increases cognitive load.
• B. Improves predictability and learnability.
• C. Hinders accessibility.
• D. Complicates the design system.

Answer: (B)

When patterns stay consistent, users can form a reliable mental model of how the interface works. The same controls look and behave the same way across screens, so people can predict what will happen next and learn new parts of the product faster. This predictability reduces the effort needed to figure things out and helps users complete tasks more quickly with fewer mistakes.

Keeping consistency also benefits the design system itself: reusable patterns mean components can be developed, tested, and updated in one place, making the whole product easier to maintain and scale. Additionally, consistent patterns can support accessibility by providing stable landmarks and predictable behavior for assistive technologies.

So the best design practice is to promote predictability and learnability through consistent patterns.