Usability Evaluation of a Map-Based Multi-Publishing Service - Advances in Cartography and GIScience - page 246

participants talked out loud to express what they were thinking as they
performed the pre-defined tasks. In total, the web test included six tasks
and the mobile test five tasks.
Figure 3: The first task in the web evaluation introduced the overall scenario and gave the
participant a simple goal to reach
After the thinking aloud tasks, the participant was given a questionnaire
concerning the tested maps. The slightly modified questionnaire was based
on the System Usability Scale (SUS) (Brooke 1996).
The evaluation of the Web Map and mobile map application provided a
large amount of qualitative data recorded on video, which we transcribed,
word-for-word, into text. From this material, we wrote down each problem
or comment on a single piece of paper as an individual observation ( Fig. 4 ) .