user_evaluation - 1 Fall 2008 CAP 6938 – Topics in...

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Unformatted text preview: 1 Fall 2008 CAP 6938 – Topics in Pen-Based User Interfaces ©Joseph J. LaViola Jr. Techniques for User Evaluation Lecture #12: User Evaluation Joseph J. LaViola Jr. Fall 2008 Fall 2008 CAP 6938 – Topics in Pen-based User Interfaces ©Joseph J. LaViola Jr. Usability Testing ¡ Not exact science (but we try!!) ¡ Want to evaluate users ¢ performance ¢ preference ¢ feedback ¡ Goals ¢ learn about individual UI techniques ¢ learn about applications ¢ learn about hardware 2 Fall 2008 CAP 6938 – Topics in Pen-based User Interfaces ©Joseph J. LaViola Jr. Basic Strategy ¡ “What do I want to learn?” ¢ based on observations, theory, etc… ¡ Generate hypotheses (if applicable) ¡ Determine how to test the hypotheses ¢ experimental setup and design ¡ Pilot studies ¢ confirm study is sound ¡ Conduct study ¡ Analyze data ¢ use statistics ¡ Report findings Fall 2008 CAP 6938 – Topics in Pen-based User Interfaces ©Joseph J. LaViola Jr. Experimental Strategies ¡ Formative – gather feedback on evolving system, set of techniques, etc… ¢ examine prototypes to refine system ¢ improve UI techniques ¡ Summative – learn about system as a whole ¢ does it do what it is designed to do ¡ Qualitative approaches ¢ survey data, preference data, open ended questions ¡ Quantitative data ¢ time to completion, error, number of clicks. etc… 3 Fall 2008 CAP 6938 – Topics in Pen-based User Interfaces ©Joseph J. LaViola Jr. Experimental Setup ¡ Want to make user comfortable ¡ Allow moderator to observe without getting in the way Video Camera Moderator Subject Fall 2008 CAP 6938 – Topics in Pen-based User Interfaces ©Joseph J. LaViola Jr....
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user_evaluation - 1 Fall 2008 CAP 6938 – Topics in...

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