A team of 3 members was in charge of executing
each test. The team consisted of one interviewer (to
introduce the task to the participant and guide
him/her along the test), one note-taker (to take
notes of all the interesting gestures, questions,
doubts etc. that participant could have) and one
camera-man (to film and record the use of the app
and film and record the face to capture the facial
expressions) [Figure 4].