0.0. Information Sources
To ensure the correct choice of information sources, it was decided to include
0 international databases in the search, arguing the following reasons:
(0) Web of Science (WoS): It is one of the most important international databases in
the world, collecting more than 000 million scientific documents. The entire main
catalogue has been used.
(0) Scopus: Because it is an outstanding multidisciplinary database compiling more than
00 million scientific documents.
(0) Sport Discus: Its incorporation was considered due to its specialty in the field of
physical activity, compiling articles related to PE.
(0) ERIC: Its incorporation has been considered because it is a database specialized in
education and has a strong link with PE as a curricular subject.
(0) Psycinfo: This database from the field of psychology was incorporated due to the link
between gamification and the psychological field.