user_evaluation - 1 Techniques for User Evaluation Lecture...

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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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user_evaluation - 1 Techniques for User Evaluation Lecture...

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