“…From around age two, partner preferences are also evident in children's prosocial behavior, as they preferentially help familiar individuals (Allen et al., 2018) or individuals who intended to share toys with them (Dunfield & Kuhlmeier, 2010), and refrain from helping or interacting with individuals who have been mean to others (Dahl et al., 2013; Tasimi & Wynn, 2016; Vaish et al., 2010). Children also show partner selectivity based on factors such as food preference and physical appearance (Fawcett & Markson, 2010), group membership (Sparks et al., 2017), accent (Kinzler et al., 2007), and whether or not individuals intended to cause bad outcomes (Martin et al., 2022).…”