1. User Control
The interface will allow the user to perceive that they are in control and will allow appropriate control.
The Weinschenk and Barker Classification, authored by Susan Weinschenk and Dean Barker, synthesizes usability heuristics from across the field — Nielsen, Shneiderman, and earlier academic work — into a more granular 20-heuristic checklist. The goal was to cover edge cases that a short list misses: things like user control, language localization, media integration, and interface forgiveness.
Because the list is longer and more specific, Weinschenk & Barker works well as a second-pass evaluation after you've already used Nielsen's 10 to catch the big issues. The extra heuristics tend to expose a different class of problems: copy that assumes one language, flows that can't be undone, media that isn't captioned, terminology that shifts between screens.
Consider this guideline for international products, accessibility-critical work, content-heavy experiences, or any product where the short heuristic lists feel like they're leaving issues unexplained.
2. Human Limitations
The interface will not overload the user's cognitive, visual, auditory, tactile, or motor limits.
3. Modal Integrity
The interface will fit individual tasks within whatever modality is being used: auditory, visual, or motor/kinesthetic.
4. Accommodation
The interface will fit the way each user group works and thinks.
5. Linguistic Clarity
The interface will communicate as efficiently as possible.
6. Aesthetic Integrity
The interface will have a tractive and appropriate design.
7. Simplicity
The interface will present elements simply.
8. Predictability
The interface will behave in a manner such that user can accurately predict what will happen next.
9. Interpretation
The interface will make reasonable guesses about what the user is trying to do.
10. Accuracy
The interface will be free from errors.
11. Technical Clarity
The interface will have the highest possible fidelity.
12. Flexibility
The interface will allow the user to adjust the design for custom use.
13. Fulfillment
The interface will provide a satisfying user experience.
14. Cultural Propriety
The interface will match the user's social customs and expectations.
15. Suitable Tempo
The interface will operate at a tempo suitable to the user.
16. Consistency
The interface will be consistent.
17. User Support
The interface will provide additional assistance as needed or requested.
18. Precision
The interface will allow the users to perform a task exactly.
19. Forgiveness
The interface will make actions recoverable.
20. Responsiveness
The interface will inform users about the results of their actions and the interface's status.
See it in action
Weinschenk & Barker's heuristics, on a live URL, in one click.
Click anywhere on a real page, drop a heurio, pick the Weinschenk & Barker's heuristics rule it violates. No screenshots, no Loom, no separate doc.