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CSC 8570 -- USI

CSC 8570 -- USI. Class Meeting 5 February 10, 2009. Opening Questions. Who among you has read at least three Harry Potter books? Who among you is a Sudoku puzzle addict? Or solver? What is a “natural algorithm”? What is the pattern and hidden meaning in the research team names?.

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CSC 8570 -- USI

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  1. CSC 8570 -- USI Class Meeting 5 February 10, 2009

  2. Opening Questions • Who among you has read at least three Harry Potter books? • Who among you is a Sudoku puzzle addict? Or solver? • What is a “natural algorithm”? • What is the pattern and hidden meaning in the research team names?

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

  4. Research Teams • Aspen: Chris, Jon, Matt • Bailey: Andrew, Katie, Joseph • Conifer: Lindsay, Nareg, Nawar • Durango: Alvin, Scott, Tony • Estes Park: Andrew, Anton, Keith

  5. 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 2/24 • Progress Report 1 due 3/10

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

  7. 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

  8. User Goals (2) • Minimize the possibility for (tragic) errors • Allow easy recovery from misdirected actions • Are easily learned and easily relearned • Fit a cognitive model based on past experience

  9. User Goals (3) • Are easy to maintain, including set up • Are flexible • Stimulate creative problem solving • Are personally satisfying

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

  11. 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)

  12. 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

  13. 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?

  14. 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.”

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

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

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

  18. ConcurTaskTreesTask Types

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

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

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

  22. Next Time • Continue work on research project, completing experimental material and IRB form • Catch up on reading • Button Exercise (see below)

  23. Button Exercise For your assigned two buttons on Windows Explorer, determine for each • Its syntax (hover, click, drag, etc.) • Its semantics (what happens for each kind of syntax) • Which cognitive dimensions and which GUEPs its behavior exemplifies. Hand in your written report next time.

  24. Back Forward Search Folders Views Go Name Size Type Date modified X (right of Folders) ↓ (next to dialog box) View File Tools Button Assignment

  25. Research Team Meetings

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