Which measurements decide handles and chairs?
- Shoe color and hair length
- Name length and age
- Grip width and seat height
Why does an average-sized product fail most people?
- Averages are illegal
- Most bodies sit on either side of average
- Nobody has a body
A kettle signals only with a beep. Who is left out?
- Users who like tea
- Users who cannot hear it
- Users with large kitchens
A glove comes in one average size and fits few. What is the fix?
- Rename the glove
- Size a range from measured hand data
- Sell it cheaper
How should the kettle signal instead?
- A louder beep only
- No signal at all
- Vibration plus raised symbol plus visual signal
Users say a tool is fine, yet all of them struggle. What should the designer do?
- Trust the answers and ship it
- Ask the same question again
- Watch real use to find hidden habits
Watching users teaches nothing beyond asking them.
Circle one: True False
Redesign a ticket machine for a user with weak hands and poor sight. What fits the lesson?
- Big textured buttons with sound, light and vibration
- Smaller flat buttons with a tiny beep
- A taller screen with paler text