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HCI. Meeting 22 Tues, November 16. Looking Ahead. Thursday, 11/18 First draft, Part 2 Tuesday, 11/23 Exam Reprise due Tuesday, 11/30 Thursday, 12/2 Research Paper due Tuesday, 12/7 Research Presentations Thursday, 12/9 Research Presentations Friday, 12/17 Final Exam, Poster.
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HCI Meeting 22 Tues, November 16
Looking Ahead • Thursday, 11/18 First draft, Part 2 • Tuesday, 11/23 Exam Reprise due • Tuesday, 11/30 • Thursday, 12/2 Research Paper due • Tuesday, 12/7 Research Presentations • Thursday, 12/9 Research Presentations • Friday, 12/17 Final Exam, Poster
Final Exam – Part 1 • Problem 1: GOMS • Some did exactly what the problem asked, others improvised • Problem 2: GUEPS and Webmail • Generally strong analysis • Problem 3: Experiment design • Oops!
Final Exam – Part 1 (2) • Problem 4: Modes • Time was a factor • Design principles needed
Final Exam – Part 1 (3) What to do: Working by yourself, but perhaps consulting the instructor, • Redo your answer to Problem 3 and submit the revised version by Tuesday, 11/23 • If you received fewer than 20 points on any other problem, you may also redo your answer to that problem and submit it by 11/23
Research Project Treatment of data • Graphs • Comparing means • Confirming hypotheses
Interaction History • Display Inertia: When the user goes back, everything is as it was before. • Bread Crumbs: Leave a trace of where the user has been.
History Types • Commands given • Sites visited • Documents opened • ?
Commands Given • Elements of a command sequence • Held as a finite sequence • Supports • Undo • Redo • Macros • Model
Sites Visited • Nodes in a digraph or tree • Held in several forms • Stack with pointer (Go menu) • Tree (History submenu) • Tree (Bookmarks)
Documents Opened • Really documents saved • Held as a numbered list of limited length
History Models Formal description of history system • Objects and methods • Mathematical structures and operations • Tasks: What does the user want? What does the user want to do?
PIE Model for Browsers • Command set, C: • Back (B) • Forward (F) • Home (H) • Follow link i (Li) • Go to page j (Gj) • Program set, P, sequence of commands • Effect, E, set of displayed web pages
PIE Model (2) • History, H = { A, p } where • A is the address sequence • p is the index of the active page • Initially,