All of the posters were designed following the same standard,
which was provided to the students by the lecturers. The poster
comprised 4 different sections of textual information (with a
limited number of words): (1) The problem (50 words), (2) The
solution (100 words), (3) The technology used in the solution (50
words), and (4) the added value of their proposal (50 words).
Furthermore, therewas also a space for including two images of the
prototype and the QR code. A sentence was included below the QR
codes inviting people to scan the codes. More specifically, the two
messages included in the posters read as follows: “Scan this code to
watch a video about the product”, and “Scan this code to watch a
video about the product and add your comment”. All of the posters
were printed in color, with the same dimensions (200 cm
long 55 cm wide). The same company printed all the posters so as
to avoid any differences. Fig. 7 shows an example of two of the
posters.
In this experiment, and in order to reduce the number of variables
to be compared, we analyzed the visitors’ interaction with the
video content and the text. Furthermore, we also collected the
visitors’ ratings of the experience.