Gaffney, G. Information & Design,www.infodesign.com.au 1999
Key Words: walk-through, usability testing, guidelines
Usability testing is a technique for ensuring that the intended users of a system can carry out the intended tasks efficiently, effectively and satisfactorily. It can be carried out at any point in the design process; however, in the early stages a "walk through" is best.
Usability tests should be attended by:
- representative user
- test host
- a developer
6-8 test sessions usually uncovers the majority of significant issues. However, even one test is better than none.
Required Materials
- formal script (to treat all participants the same way)
- pre-evaluation questionnaire (to check there profile)
- a list of tasks (and criteria)
- logging sheets (to record timing, events, actions, comments, concerns)
- post-evaluation questionnaire (to measure user satisfaction)
Guidelines
- run a pilot test
- make sure participants are put at ease
- do not prompt participants unless clearly indicated
- record in as much detail as possible
- do not interrupt (if there are other observers)
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