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- 1What is the Evaluator Effect?The “evaluator effect” is the term used to describe the large amount of variability that has been identified in usability evaluation work arising from the evaluator. This variability has been observed in both user testing and expert reviews. Refers firstly to the fact that different evaluators will choose differ evaluation techniques in
the same situation and secondly will conduct the evaluations differently to yield different
results (e.g. by choosing different tasks).
User testing: evaluators will see different usability problems in the same user data
(observations, verbal protocols), rate the severity of problems differently, propose different
fixes.
Expert reviews: expert evaluators using the same technique will predict different problems;
rate the severity of problems differently, propose different fixes.
Importance: there are arguments both ways as to whether or not practitioners and researchers
should be concerned about this. Mostly, because usability arises from the interaction of the
user, variability has the advantage that we get a range of views about it.
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- Karteikarten am Ohne Titel, erstellt von Nafisah Khan am 14/05/2018.
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