“…Specifically, based on the framework of inherited differential susceptibilities to environmental factors, individuals carrying specific genotypes may be especially vulnerable to adverse environments (Belsky & Pluess, 2009;Luo et al, 2015Luo et al, , 2016. Indeed, studies have examined the effects of gene-environment interactions on individual-level psychological features, such as resilience, empathy, externalizing behavior, and temperament (Caspi et al, 2002(Caspi et al, , 2010Cicchetti & Rogosch, 2012;Das et al, 2011;Luo et al, 2019;Luo, Yu, & Han, 2017;Luo, Zhu, et al, 2017;Thompson et al, 2012). For instance, Cicchetti and Rogosch (2012) combined four genotypes (for the genes encoding serotonin, corticotropin-releasing hormone, dopamine, and oxytocin genes) into a composite score that predicted the resilience levels of low-income maltreated and non-maltreated children.…”