user_evaluation - 1 Techniques for User Evaluation...

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Unformatted text preview: 1 Techniques for User Evaluation Lecture #12: User Evaluation Fall 2009 CAP 6105 – Pen-Based User Interfaces ©Joseph J. LaViola Jr. Joseph J. LaViola Jr. Fall 2009 Usability Testing ¡ Not exact science (but we try!!) ¡ Want to evaluate users ¢ performance ¢ preference ¢ feedback ¡ Goals ¢ learn about individual UI techniques Fall 2009 CAP 6105 – Pen-Based User Interfaces ©Joseph J. LaViola Jr. ¢ learn about individual UI techniques ¢ learn about applications ¢ learn about hardware 2 Basic Strategy ¡ “What do I want to learn?” ¢ based on observations, theory, etc… ¡ Generate hypotheses (if applicable ¡ Generate hypotheses (if applicable) ¡ Determine how to test the hypotheses ¢ experimental setup and design ¡ Pilot studies ¢ confirm study is sound ¡ Conduct study Fall 2009 CAP 6105 – Pen-Based User Interfaces ©Joseph J. LaViola Jr. ¡ Conduct study ¡ Analyze data ¢ use statistics ¡ Report findings 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 Fall 2009 CAP 6105 – Pen-Based User Interfaces ©Joseph J. LaViola Jr. ¢ survey data, preference data, open ended questions ¡ Quantitative data ¢ time to completion, error, number of clicks. etc… 3 Experimental Setup ¡ Want to make user comfortable ¡ Allow moderator to observe without getting in the way Video Camera Subject Fall 2009 CAP 6105 – Pen-Based User Interfaces ©Joseph J. LaViola Jr. Moderator Experimental Design ¡ Difficult task ¢ need to remove as much variability as possible ¢ always want to err on the side of more data collection ¢ art more than science ¢ conditions (4 x 2, 2 x 2 x 2, etc…)...
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This note was uploaded on 06/12/2011 for the course CAP 6105 taught by Professor Lavoila during the Spring '09 term at University of Central Florida.

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user_evaluation - 1 Techniques for User Evaluation...

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