A mathematical model of the finding of usability problems
INTERCHI '93 Proceedings of the INTERCHI '93 conference on Human factors in computing systems
Foundations of statistical natural language processing
Foundations of statistical natural language processing
Determining the effectiveness of the usability problem inspector: a theory-based model and tool for finding usability problems
Applying user testing data to UEM performance metrics
CHI '04 Extended Abstracts on Human Factors in Computing Systems
Comparative usability evaluation
Behaviour & Information Technology
Current practice in measuring usability: Challenges to usability studies and research
International Journal of Human-Computer Studies
A comparative evaluation of heuristic-based usability inspection methods
CHI '08 Extended Abstracts on Human Factors in Computing Systems
Damaged merchandise? a review of experiments that compare usability evaluation methods
Human-Computer Interaction
Supporting novice usability practitioners with usability engineering tools
International Journal of Human-Computer Studies
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Studies comparing performance of Usability Evaluation Methods (UEMs) led to three standard metrics, namely, validity, thoroughness, and effectiveness, calculated from lab-based usability test results. The effectiveness metric, E = T × V, was proposed as the `figure of merit' [7] that would give a balanced account of validity and thoroughness. This paper provides an analysis of the formula to caution future researchers and usability practitioners against its use, proposes an alternative formula, and discusses the limitations of the common baseline approach to UEM comparison.