It is common to think of time-on-task data gathered only during summative evaluations because, during a formative evaluation, the focus is on finding and fixing problems, or at least finding the problems and delivering a report. For a variety of reasons, time-on-task measures often get left out of the mix. This article shows that time-on-task can be a valuable diagnostic and comparative tool during formative evaluations.

Task Times in Formative Usability Tests