In 2004, we examined the following bibliographical databases: Eric, Francis, First search education, Ariane
These/Mémoire, Tecnedoc, Emile, Current Contents, Repère, MedLine as well as Web sites about games. This first
extraction allowed us to identify 1,303 references. From June to December 2005, we examined the following
bibliographical databases: Academic search premier, Religion and philosophy collection, Scholar Scholar, Sage
Full-text collections, Ingenta, Emerald, Web of Science. This second extraction turned up 481 references that we
added to our bibliographical corpus.