“…There is evidence to suggest that CU traits are malleable for younger children, in particular when the parents are involved in treatments that specifically target CU-specific risk factors (Dadds et al, 2019;Kimonis et al, 2019;Kjøbli et al, 2018;Waller et al, 2013). While some treatment studies in adolescent samples have also reported reductions in CU traits (e.g., Lui et al, 2019;Salekin et al, 2012;Thøgersen et al, 2021), others show more mixed results (Butler, 2011;Fonagy et al, 2018) or no change (Manders et al, 2013;Reddy et al, 2013). The fact that reductions in CU traits are mostly observed in studies without a control group or across treatment conditions, makes it difficult to ascertain that CU traits respond to treatment rather than being a result of time, maturation, or measurement effects.…”