1. Hick’s Law – The Law of Decision Time
The more options a user has, the longer it takes to decide. Too many choices can overwhelm users, leading to indecision. Simplify to make decision-making faster—like a menu with just enough items to feel confident instead of panicking.
✅ Use it:
- Limit menu items and navigation links.
- Break complex tasks into smaller steps (e.g., multi-step forms).
- Highlight primary actions (“Sign Up” vs. “Learn More”).
2. Fitts’s Law – The Law of Target Size
The time to reach a target depends on its size and distance. Larger, closer buttons are easier and faster to interact with.
✅ Use it:
- Keep essential buttons large and easy to tap.
- placing small interactive elements too close together.
- Position key actions (like “Submit” or “Buy Now”) where the thumb naturally rests.
3. Jakob’s Law – The Law of Familiarity
Users prefer your site to work like others they know. Familiar designs build trust and avoid confusion.
✅ Use it:
- Follow established design patterns (like the hamburger menu).
- Avoid unnecessary innovation that sacrifices usability.
- Maintain consistency across your app or website.
4. Miller’s Law – The Law of Memory Limits
People can hold about 7 items in their working memory. Too much information causes cognitive overload, so simplify and organize content.
✅ Use it:
- Group information into smaller chunks.
- Use visuals or steps to break complexity.
- Avoid overwhelming users with all instructions at once.
5. Parkinson’s Law – The Law of Time Use
Work expands to fill the time available. Efficient design promotes faster task completion.
✅ Use it:
- Set clear time constraints for tasks.
- Create streamlined workflows to encourage quick actions.
6. Doherty Threshold – The Speed Law
A system that responds within 400ms keeps users engaged by maintaining flow. Delays disrupt attention and cause frustration.
✅ Use it:
- Optimize loading times.
- Use micro-interactions and animations to indicate progress.
- Provide feedback for every user action.
My UI/UX design, Rozenta VPN – Advanced VPN UI for Modern Users.
Why These Laws Matter
UX laws aren’t just theories—they’re practical tools that guide real-world design decisions.
By following them, you’ll:
Reduce friction and confusion.
Increase engagement and satisfaction.
Build interfaces that “feel” natural and human-centered.
💡 Final Thoughts
Mastering UX laws is like learning the grammar of design. Once you understand the rules, you can apply them creatively to craft intuitive, beautiful experiences.
Whether you’re a beginner or a seasoned designer, keep these principles close. Because the best UX doesn’t just look good—it feels right.