The subjects were asked to complete the assigned tasks ”as accurately
and as fast as possible”. They were also told that it was
more important to solve the tasks correctly rather than to be quick.
After being presented with all 8 tasks (4 UI * 2 tasks), the users
were given a questionnaire and asked to directly compare the evaluated
techniques. Each evaluation session lasted approximately 60
minutes. Presentation of variables was counterbalanced by means
of Latin square design.