“…Subsequently, new methods were developed that have made it easier to account for the recognition and practice of equality and merit at increasingly younger ages. This has allowed the comparison of findings across different age groups and the use of different measuring protocols: middle-childhood (Forsé et al, 2016;Jennings, 2019;Lutz, 1988;Noh, D'Esterre and Killen, 2019); comparisons between middle-childhood and early or late childhood (Fehr et al, 2008 and2013;House et al, 2013a and2013b;Kienbaum and Wilkening, 2009); preschool-age children in first-party tasks, in which the child can benefit directly from the distribution (Hamann et al, 2011 and2014;Ulber, Hamann and Tomasello, 2017;Warneken et al, 2010), or third-party tasks, in which the child participates as an impartial judge of a story (Baumard et al, 2012;Chernyak et al, 2016 andChevallier et al, 2015;Kenward and Dahl, 2011;Liénard et al, 2013). Finally, methodological innovations have even prompted the study of the prevalence of these preferences in the second year of life (Geraci and Surian, 2011;Schmidt and Sommerville, 2011;Sloane et al, 2012;Sommerville et al, 2013, Surian andFranchin, 2017).…”