“…In two studies, indeed, participants were asked about their identification as Europeans. There is a huge interest among social scientist about European identity ( Castano, 2004 ; Herrmann & Brewer, 2004 ; Hooghe & Marks, 2004 ; Lubbers, 2008 ; Thomassen & Back, 2008 ; Vetik, Nimmerfelft, & Taru, 2006 ), which has been shown to have a significant effect on relevant outcomes, such as group-based trust, willingness to cooperate, attitudes towards EU deepening and widening ( La Barbera, 2015 ; La Barbera, Cariota Ferrara, & Boza, 2014 ; Zielonka, 2005 ). Moreover, there is a growing interest about the dimensionality of European identity, and few theoretical conceptualization has been proposed ( Bruter, 2003 ; La Barbera & Cariota Ferrara, 2012 ), yet the topic needs a deeper investigation ( La Barbera et al, 2014 ).…”