Human Computer Interaction CSC 4730-100 User System Interface CSC 8570-001

1. Human Computer InteractionCSC 4730-100User System InterfaceCSC 8570-001 Class Meeting 5 September 25, 2012

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

3. Research Teams • Aspen: Ken, Kevin, Kristin • Bailey: Andrew L, James B, Shishir • Conifer: James N, Mike • Durango: Andrew D, Chris, Donald • Estes Park: Anthony, John, Tyler

4. Research Project Issues • Add to bibliography – goal is at least 15 references • Design experiment • Create experimental tools • Complete IRB form • Remember to edit sample consent form making it describe your project • Start writing Introduction and Background sections • Dates • IRB form finished no later than 10/9. Hence, • Experimental materials finished no later than 10/9 • Progress Report 1 due 10/30

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

6. User Goals Based on inferences from last week’s discussion and other sources, here’s a list of user goals. Do you take these as your 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

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

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

9. 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

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. 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?

13. 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.]

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

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

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

17. Next Time • Continue work on research project: experimental material and IRB form due on 10/9 • Catch up on reading

18. Research Team Meetings