“…For example, infants prefer to look at, and accept toys from, people who speak their native language over people who speak a foreign language (Kinzler, Dupoux, & Spelke, 2007). From at least the age of 5, and probably as young as 3, children prefer members of their own group even when those groups are 'minimal', that is, based on arbitrary, experimentercreated distinctions such as shirt colour (Bigler, Jones, & Lobliner, 1997;Dunham, Baron, & Carey, 2011;Richter, Over, & Dunham, 2016). Cultural transmission also appears to play a role in determining children's attitudes towards real-world groups (Allport, 1954;Devine, 1989).…”