Evaluating the Usability of Mobile Systems: Exploring Different Laboratory Approaches
This paper addresses mobile system usability evaluations. Three different think-aloud evaluations of the same mobile system were conducted for the purpose of comparing the results by each approach. The evaluations spanned the use of test subjects with and without domain specific knowledge and the use of simple laboratory setups as well as high-fidelity simulations of the use context. The results show some significant differences between the results produced by the three approaches. However, t is indicated that while the recreation of a highly realistic use context resulted in a number of unique usability problems being identified, a large percentage of the usability problems found in total were identified already in the simple laboratory setups.