“…Elementary school children have some basic levels of self-awareness and they can describe themselves in concrete, behavior-oriented ways (e.g., "I am a girl; I have two brothers"). Yet adolescence is regarded as the time when people have the cognitive and emotional capacities to reorganize their selfconceptions and to imagine alternative and future selves in order to develop a coherent sense of self (see Kroger, 2005;Schwartz, Donnellan, Ravert, Luyckx, & Zamboanga, 2013, for overviews). Because the development of a sense of self and identity are central to adolescents' psycho-social development, we expect that aspects of happiness referring to eudaimonia will only be mentioned by adolescents, not by children (see Freire et al, 2013;Giacomoni et al, 2014).…”