1. Interaction Styles Chris North cs3724: HCI

2. Presentations mike miller sean king Vote: UI Hall of Fame/Shame?

3. Quiz The 5 UI metrics? Performance time Retentiontime Error rates Learning time Subj satisfaction

4. Shneiderman’s 8 Golden Rules 1.Consistency multi-close Word, PPT 2.Shortcuts for experts Word bold 3.Feedback Wysiwyg 4.Sequences with closure wizards 5.Prevent errors, rapid recovery undo 6.Easy reversal HomeFinder 7.User control ClipIt modal 8.Reduce memory load web nav, phone menu

5. Interaction Styles Command language Menus Direct manipulation

6. Example: File Management % rm myfile.txt % _

7. Command Language Examples: Unix, DOS zork ftp Matlab Quake console 555-tell

8. Command Language Good: experts, frequent, fast Flexibility, lots o options 0 clutter Macros, scripting Bad: learning time huge Little feedback Memory intensive Error rate high Reversal hard

9. Menus Examples: App pull-down menus Context menus phone menus Start menu Track auto part orders Fast food, vending machines Dialog boxes Web pages

10. Menu Guidelines 2 level look ahead Meaningless labels?

11. Menu Guidelines Broad-shallow vs. narrow-deep Depth = log branchingFactor numPages Usability: max depth  3-4

12. Menus Good: reveals all the options Good retention: uses recognition instead of recall Filter options by tree structure Enables trial-and-error Bad: limits options, or gets too big Labeling is difficult What is the object (noun) for the action (verb)? Consistency difficult?

13. Direct Manipulation Examples: Drag-n-drop file icons desktop window resizing Image editing Drawing Powerpoint slide sorter Car, real world stuff

14. Video Games

15. Direct Manipulation Principles Visual representation Rapid, incremental, reversible actions Pointing and selecting Immediate feedback “Just do it”

16. Direct Manipulation Good: fast learning time Metaphors, leverage Faster for novice/intermed Cross-cultural? Feedback, fast performance Reduce errors Encourage exploration Bad: Not good for macros, scripting Limits complexity/options Clutter, tons of visual stuff Ending sequences? Metaphors can fail

17. Combined Strategies Word Cut-n-Paste: Ctrl-x, ctrl-p Edit menu Drag-n-drop

18. Cruise Control Users: drivers, highway Tasks: Relieve foot Maintain speed on highway Very fast shutoff Temporary speed increase, decrease Match speed limit!!!!! Acceleration control? Minimize distraction Current systems: set, off, +, - (menu) Type/speak speed (command line) Touch Speedometer, dial (direct manip)

19. Assignments Read: DTUI ch 1-3 Homework #1 due Thurs Visual Basic: msdn.microsoft.com Presentations: Thurs: brian hostetle, daniel boisson Next Tues: bruce billian, nick meyers Next Thurs: taylor mitchell, chris henry