2. The sandwich was removed from the
participant’s sight, as if they had eaten it. Then they
were asked to add the information of that sandwich
to the app [Figure 5]. Participants were provided
with an iPhone that had MFP app installed and
setup of daily calorie consumption information. The
test aimed to discover the important insights of
adding food to the app, more than letting
participants set their own weight goal. While
participants were using the app, the camera-man
started filming their facial expressions and their use
of the app. Participants were asked to think aloud
during this exercise.