Quijano Sánchez, LaraRecio García, Juan AntonioDíaz Agudo, María Belén2023-06-202023-06-202011978-3-642-23290-9https://hdl.handle.net/20.500.14352/45403© Springer Verlag Berlin Heidelberg 2011. International Conference on Case-Based Reasoning (19th. Sep 11-14, 2011. London, England). Supported by Spanish Ministry of Science & Education (TIN2009-13692-C03-03) and Madrid Education Council and UCM (Group 910494).In this paper we introduce our application HappyMovie, a Facebook application for movie recommendation to groups. This system takes advantage of social data available in this social network to promote fairness for the provided recommendations. Group recommendations are based in the individual satisfaction of each individual. The(in)satisfaction of users modifies the typical aggregation functions used to estimate the value of an item for the group. This paper proposes a memory of past recommendations to compute the satisfaction of users when similar items (movies, in this case) are recommended several times.engbook parthttp://link.springer.com/content/pdf/10.1007%2F978-3-642-23291-6_17http://link.springer.com/open access004.8SystemsInformática (Informática)1203.17 Informática