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Usability Testing. Janet C Read. Please Mrs Butler this boy Derek Drew keeps copying my work, Miss What shall I do? Allan Ahlberg – Please Mrs Butler. Objectives. At the end of this session, participants will be able to:
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Usability Testing Janet C Read
Please Mrs Butler this boy Derek Drew keeps copying my work, Miss What shall I do? Allan Ahlberg – Please Mrs Butler
Objectives • At the end of this session, participants will be able to: • Describe the problems of observing children and suggest ways to limit their effects • Discuss the pros and cons of different observational techniques • Log observations
Methods • Observational • Think-aloud • Co-operative evaluation • Co-discovery • Experimental
"The things we collect statistics about are primarily those things that are easiest to identify and count or measure - which may have little or no connection with those factors of greatest importance."(Norman 1994).
What might we measure? • Effectiveness • Efficiency • Satisfaction ISO
Observational methods • Video • Protocol analysis • Interpretation
Experimental Methods • Choice (of subjects) • Control (of variables) • Reliability (of data) • Validity (of results)