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CS147-2011-04-Prototyping

CS147-2011-04-Prototyping - Rapid Prototyping Techniques...

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Rapid Prototyping Techniques scott klemmer fall 2011 cs147.stanford.edu
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Steven Dow, Stanford HCI Group, Oct 2010 Wizard-of-Oz technique Defn (v): To prototype an interactive system by using human operators to simulate machine behavior
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Steven Dow, Stanford HCI Group, Oct 2010 Wizard-of-Oz technique Make an application operate without (much) code Front end interface (hard to fake this part) Remote (wizard) interface to control user interface Must take less time/money than building the real thing Get feedback from users (fidelity issues) Hi-fidelity == users think it’s real, their behavior matters Low-fidelity == users have license to suggest changes
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Steven Dow, Stanford HCI Group, Oct 2010 Dahlbäck, Jönsson, & Ahrenberg, 1993 natural dialogue interfaces Wizard-of-Oz technique
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Aardvark “Why Start-Ups Must Pay Attention To What’s Behind The Curtain” Venture Capital Dispatch - WSJ
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Steven Dow, Stanford HCI Group, Oct 2010 Dahlbäck, Jönsson, & Ahrenberg, 1993 natural dialogue interfaces location-based apps Li, Hong, & Landay, 2004 speech-based interfaces Klemmer, et al., 2000 Tran, Mynatt, et al., 2005 computer vision Wizard-of-Oz technique
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Steven Dow, Stanford HCI Group, Oct 2010 How to make a WOz prototype Map out scenarios and application flow (what should happen in response to user behavior?) Put together interface “skeletons” (minimal autonomy) Develop “hooks” for wizard input Where and how the wizard will provide input (e.g., selecting the next screen, entering text, entering a zone, recognizing speech, etc.); Must be possible to replace later with computer Rehearse wizard role with a colleague (Wizard should be able to perform the task)
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Steven Dow, Stanford HCI Group, Oct 2010 How to test a WOz prototype Recruit samples users (IRB concerns) Give users tasks or a clear indication of what they should be doing (paper instructions) One team member operates WOz interface (more authentic if hidden or in a remote location) One team member conducts evaluation, observes user -Think aloud (speak freely as performing tasks) -Retrospective (best when think aloud distracts) -Heuristic evaluation (works with experts too) Debrief users, reveal wizard
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Steven Dow, Stanford HCI Group, Oct 2010 How Might We...?
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