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CSC 8570 -- USI

CSC 8570 -- USI. Class Meeting 4 February 3, 2009. FLICS. Fantastic Lectures in Computer Science Friday, February 6 Bryn Mawr College Bernard Chazelle, Princeton Univ. What an iPod, a Flock of Birds, and Your DNA Have in Common. Topics of the Day. GOMS review

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CSC 8570 -- USI

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  1. CSC 8570 -- USI Class Meeting 4 February 3, 2009

  2. FLICS Fantastic Lectures in Computer Science • Friday, February 6 • Bryn Mawr College • Bernard Chazelle, Princeton Univ. • What an iPod, a Flock of Birds, and Your DNA Have in Common

  3. Topics of the Day • GOMS review • Bunt, et al. Understanding the questions raised and the answers given. • Good and bad interfaces • Design principles • Research project issues

  4. Hand In • Everyone: GOMS model of table creation • Each research team: • Hypotheses, independent and dependent variables • First draft of IRB form • Consent form draft, perhaps • Printout from EndNote of research bibliography

  5. GOMS • Goal • Operators: atomic actions available in the system • Methods: each method is a sequence of operators • Selection Rule:

  6. GOMS Examples • Deleting a message from a mail system folder • Setting a clock or watch • one hour ahead • one hour back • to a particular time • Creating a KWIC index of a list of research paper titles

  7. Clock Setting • Set the clock one hour earlier, the common action at the end of daylight savings time. • GOMS model • Goal: stated above • Operations: • Methods: • Selection Rule:

  8. Bunt, Conati, McGrenere • Review the paper in the context of • Your experiment • GOMS modeling • Intelligent user interfaces • User modeling

  9. Bunt (2) • Adaptable: Users can customize the interface to meet their needs • But users rarely move from default settings • Adaptive: Model user’s interests, preferences, and use characteristics; then interface changes to support this model. • But users suffer lack of control, transparency, and predictability

  10. Bunt (3) • Adaptive issues • Is customization worth the effort? • Can users customize effectively? • Does the system provide support (and help) for customization?

  11. Bunt (4) • Experiment 1: • Hypotheses? • Independent variables? • Dependent variables? • Subjects? • Statistical analysis?

  12. Bunt (5) • Experiment 2: • Hypotheses? • Independent variables? • Dependent variables? • Subjects? • Statistical analysis?

  13. Bunt (6) • Suggest some experiments that follow from this work.

  14. How Was Your Week? • Write down two examples of system interfaces that were very helpful as you tried to complete a task. • Write down two examples of system interfaces whose design made it difficult for you to complete a task.

  15. Good Interfaces • Who says? • On what basis? • Why were your choices good? • What were the design principles that promoted “goodness”?

  16. Bad Interfaces • Same questions as for “good” • Who says? • On what basis? • What design principles were violated?

  17. Good and Bad (2) • What do users want? • How do designers know? • Do designs match mental models? • What if they don’t?

  18. Good and Bad (3) • Generative User Engineering Principles (GUEPs) • Cognitive Dimensions (CDs) • of notation • of representation in an interface • of understanding NB. In this context a “dimension” is a factor (distinct from others factors)

  19. Research Project • Hypotheses (tonight) • Independent variables (tonight) • Dependent variables (tonight) • Bibliography • First entries (tonight) • Continuous process • Background • Formal setting (let’s talk)

  20. Theory Collection Visual processing • Three-stage visual system • Preattentive processing theory (Triesman & Gormican) • Structured object perception theory (Biederman) • Scientific color theory (CIE)

  21. Theory Collection (2) Motor Behavior Models • Hick-Hyman Law: choice time • Keystroke-Level Model: error-free task completion time • Three-state model of graphical input (Buxton) • Fitts’ Law: human movement • Guiard’s Model of Bimanual Skill

  22. Theory Collection (3) Task analysis • Hierarchical model using ConcurTaskTrees Design principles • GUEPs • Cognitive Dimensions • Mental models

  23. Research Project (2) • Short presentation • One spokesperson • Five minutes • Hypothesis, variables, initial experimental design • PowerPoint

  24. Next Time • Read Edge and Blackwell, Cognitive Dimensions Tradeoffs in Tangible User Interface Design • You find this paper by going towww.cl.cam.ac.uk/~afb21/CognitiveDimensions • Then choosing the link for the 10th Anniversary Workshop on CDs research • Create a concept map relating the ideas of the paper to one another • Use the concept map software • Make sure you include at least 12 concepts and maybe many more • Consult the papers by Thomas Green for more information • Research project presentation

  25. Research Team Meetings

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