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CSC 8570 -- USI

CSC 8570 -- USI. Class Meeting 5 September 21, 2010. Phrase Exercise. Only 4 from the grammar had no meaning to anyone drag and drag move and drag drag twice move twice Conversely, either 6 or 7 experts (that’s you) agreed

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CSC 8570 -- USI

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  1. CSC 8570 -- USI Class Meeting 5 September 21, 2010

  2. Phrase Exercise • Only 4 from the grammar had no meaning to anyone • drag and drag • move and drag • drag twice • move twice • Conversely, either 6 or 7 experts (that’s you) agreed • Tap is described by one phrase commonly chosen from the grammar, but only one expert assigned it to tap • Double tap is described by 8 phrases from the grammar • Press and hold is described by 5 phrases from the grammar • Press and drag is described by 1 phrase from the grammar

  3. Phrase Exercise (2) The two-finger interactions: • The only phrase that most everyone attached to an action, and one of the actions was Pull together/Pull apart, was double press Conclusion: Describing actions in common terms is difficult and should proceed from the interface view to the user view, rather than the other direction.

  4. Research Project • Short presentation • One spokesperson • Five minutes • Hypotheses, variables, initial experimental design • Questions and comments from the audience

  5. Research Teams • Aspen: Matt, Vince • Bailey: Gerry, Vinay • Conifer: Yi-Ling • Durango: David • Estes Park: Ivan

  6. Research Project Issues • Add to bibliography – goal is at least 15 references • Design experiment • Create experimental tools • Complete IRB form • Start writing first two sections • Dates • IRB form finished no later than 10/5 • Progress Report 1 due 10/26

  7. Summary of Some Ideas • User goals • Mental models • GUEPs • Cognitive dimensions

  8. User Goals Based on last week’s discussion and other sources, here’s a list of user goals. Users want systems that: • Are powerful, meaning fast and efficient • Have proper functionality • Minimize the possibility for (tragic) errors • Allow easy recovery from misdirected actions • Are easily learned and easily relearned

  9. User Goals (2) • Fit a cognitive model based on past experience • Are easy to maintain, including set up • Are flexible • Stimulate creative problem solving • Are personally satisfying

  10. GUEPs and CDs • GUEPs(Generative User Engineering Principles) • CDs(Cognitive Dimensions)

  11. Relating GUEPs and CDs Match the 14 cognitive dimensions to the 9 GUEPs looking for overlapping and orthogonal ideas. Summarize the results by creating a 14 by 9 array whose cell entries describe the relationship between the ith CD and the jth GUEP

  12. Mental Models As theories: • Constructed by humans • Based on their world experience • What they believe to be true about particular domains, devices, or systems

  13. Mental Models As problems spaces • Mental structures (ideas, concepts, virtual worlds) • Contain possible states • Searchable so that users can plan their behaviors (paths from one state to the next converging on a solution)

  14. A Lengthy Example iPods at the ready • What is your mental model of an iPod? • What do you believe to be true about an iPod? • How would you describe the problem space associated with an iPod?

  15. iPod (2) What tasks do you want to accomplish with an iPod? • Described in high level terms • In a different context, “I want fresh tomatoes from my garden on my salad.” [No specifications about planting, tending, picking or preparing the tomatoes.]

  16. iPod (3) What operators are available? • Physical keys or widgets • Virtual widgets on the interface

  17. iPod (4) What notation do we use for widget interaction? • Do we need to expand Card & Moran or Raskin & Beck?

  18. iPod (3) Preparing for task analysis • Tasks vs. goals • Hierarchical task analysis vs. GOMS • ConcurTaskTrees • http://giove.cnuce.cnr.it/ctte.html

  19. ConcurTaskTreesTask Types

  20. Unary Operators Icon Description Syntax * Iterative T1 * [ ] Optional [ T1 ] Connection T1 ConcurTaskTreesOperators

  21. Synthesizing Edge and Blackwell Referring to your concept map: • What is its structure? • What is its shape? • What is its top-level concept?

  22. Leave Behind • Concept map of the Edge and Blackwell paper

  23. Next Time Remember that “next time” is October 5 • Continue work on research project, completing experimental material and IRB form • Catch up on reading

  24. Research Team Meetings

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