1. CS 485/515 General course outline Design for people – theory and vocabulary Just enough psychology Task-centered procedure for user interface design. Tools for user interface design Application to your own projects –Initial design and cognitive walkthroughs –Iterative design and user tests Advance User Interface topics and techniques URL: crl.nmsu.edu/~ogden/cs485

2. Today’s theme It’s obvious… (Or: It is easy when you know how)

6. Which is more obvious?

8. 2004

9. 2007

10. 2008

11. 2009

12. 2010

14. Is UI design easy or hard? Does it really matter? Even simple decisions require thought and are influenced by experience Al Gore – George Bush election determined by UI design. It is easy to blame the user.

15. Same or different? A A a A A B Even simple decisions require thought and depend on context

16. Did the user (voter) see the arrow? How do you know? Florida Butteryfly Ballot

17. 19,120 ballots in West Palm Beach were disqualified/nullified because of double voting. Margin of victory was 512 votes.

18. Sample ballot looks easier when the holes are missing. Sample Ballot

19. Presidential page is different from all other ballots.

20. Linear Visual Search

21. Numeric Mapping

25. http://danbricklin.com/log/ballotusability.htm

26. Today’s theme (restated) Expectations influence perceptions (aka “It’s obvious”) The Cow example shows us: –The more you know the less likely you will be able to judge what others may know. –What you ‘know’ influences what you ‘see’ –You can’t judge a user interface by just looking at it.

27. Remember the cow

28. Today’s questions What is an interface? What is a good interface?

29. Push or Pull ?

31. “Designer” Door

32. Good and bad design What is wrong with the Apex remote? Why is the TiVo remote so much better designed? –Peanut shaped to fit in hand –Logical layout and color- coded, distinctive buttons –Easy to locate buttons

33. What is a good interface? There is no such thing –cf. Good furniture arrangement The test of quality depends on it’s context –How will the software be used? Who will use it? How long? –How important is: Learnability? Portability?... The answers vary for each application Finding the answers is the first step in UI design Depends on users and tasks. So we must learn a process for figuring it out.