“…Our use of trajectory‐based and dimensional approaches enabled us to examine associations for both a discrete group of “persistently low prosocial” children, as well as across a broader continuum of severity. Although the SDQ's prosocial scale has been shown to robustly associate with psychosocial and functional outcomes (Meehan, Maughan, & Barker, 2019), it may be too nonspecific to reliably detect a unified underlying biological substrate. Moreover, prosocial behavior is increasingly viewed as a multi‐faceted phenotype (Van IJzendoorn & Bakermans‐Kranenburg, 2014) that incorporates, and interacts with, a range of motivational, cognitive, and affective processes, including altruism, perspective‐taking, Theory of Mind, and empathic concern, as well as contextual factors (e.g., Imuta, Henry, Slaughter, Selcuk, & Ruffman, 2016; Preckel, Kanske, & Singer, 2018; Van der Graaff, Carlo, Crocetti, Koot, & Branje, 2018).…”