1. Everyday Things Donald Norman

2. You would need and engineering degree to figure this out? What devices have tried that were not easy to use? – Watches – VCRs – Packages that seem impossible to open – Washing Machines – http://www.actsofvolition.com/archive/2001/mar ch/coffeepotfor

3. What is this? http://www.actsofvolition.com/archive/2001/ march/coffeepotfor http://www.actsofvolition.com/archive/2001/ march/coffeepotfor

4. Devices that are complex to operate Aircraft

5. Devices that are complex to operate 18 wheeler

6. Devices that shouldn’t be complex, BUT sometimes are Everyday Things – Doors Correct parts must be visible They must convey the right message – Telephone systems

7. Conceptual Models Affordances – Scissors – Chairs Constraints – Scissors Size of Holes Mappings – Between holes and fingers, the set of possible operations is suggested and constrained by the holes See Figure 1.7

8. What is wrong with my Fridge? Figures 1.8, 1.9

9. Good & Bad Design

10. Good Design (our goal!) “Every designer wants to build a high-quality interactive system that is admired by colleagues, celebrated by users, circulated widely, and imitated frequently.” (Shneiderman, 1992, p.7) …and anything goes!…

11. The Good…

13. The Bad…

15. The Good…

16. The Bad…

17. The Ugly…

19. The (really) Ugly…

20. What The…???

21. Impossible Objects or unworkable objects

22. More Impossible Objects http://www.cienaniosdeperdon.com.ar/IO/index1.htm