Summative Usability Testing:
Measurement and Sample Size
Jurek Kirakowski University of College Cork, Ireland
18.1 INTRODUCTION
Usability testing can take many forms, for instance, expert inspections, employ-
ment of “user representatives” for their opinions, and various forms of auto-
mated testing. Nevertheless, in a survey published by the Usability Professionals’
Association in 2001, “usability evaluation with real users” was the most popular
activity cited by the respondents (Usability Professionals Association, 2001).
Usability evaluation (sometimes called testing) refers to two different activities. It
is customary, following terms used in educational ...