“…Studies have empirically investigated the nature of the latent structure of APD and BPD, seeking to resolve the controversy of the categorical and dimensional approaches of these disorders. The results do not seem to support the categorical perspective previously used in the psychiatric diagnostic manuals, revealing the APD and BPD as having a dimensional nature (Arntz et al, 2009;Kerridge, Saha, & Hasin, 2014;Marcus, Lilienfeld, Edens, & Poythress , Walters, Diamond, Magaletta, Geyer, & Duncan, 2007). In contrast, there are a number of studies pointing them as categorical in nature (Hallquist & Pilkonis, 2012;Haslam, 2003;Lönnqvist, Verkasalo, Wichardt, & Walkowitz, Trull, Widiger, & Guthrie, 1990;Vasey, Kotov, Frick, & Loney, 2005).…”