“…There is robust evidence that secondary CU variants experience extreme levels of adverse childhood experiences and particularly dysfunctional parenting (Craig et al, 2021a). The nature of their adversity is broad, ranging from low maternal warmth/sensitivity (Craig et al, 2021a;Fanti & Kimonis, 2017;Kaouar et al, 2023) and affectionless and rejecting parenting (Karpman, 1941), to parenting that is harsh (Goulter et al, 2017;cf. Bégin et al, 2021;Craig et al, 2021a;Humayun et al, 2014), hostile and verbally aggressive (Craig et al, 2021a), to childhood maltreatment (i.e., sexual or physical abuse or neglect; Bégin et al, 2021;Goulter et al, 2019;Kahn et al, 2013;Kimonis et al, 2011Kimonis et al, , 2012aKimonis et al, , 2017aKimonis et al, , 2017bPorter, 1996), to experiencing interpersonal traumatic events including witnessing intimate partner violence and other violence exposure (Bennett & Kerig, 2014;Docherty et al, 2016;Kahn et al, 2013;Sharf et al, 2014;Tatar et al, 2012), to broader cumulative environmental risk across early childhood (Cecil et al, 2014).…”