On this page
POUR Principles
The four principles#
Select a principle.
Interactive demo
POUR explorer
POUR principles
Information and UI must be presentable in ways users can sense.
- Example: Text alternatives for images; captions for video.
- Common failure: Icon-only status with no text or accessible name.
- Takeaway: If someone cannot see or hear it, provide another channel.
Engineering takeaway#
When reviewing a control, ask all four questions: Can it be perceived? Operated? Understood? Exposed robustly to user agents and AT?