“…Although the bifactor model may be a valuable approach to better understand the structure of OC symptoms, no studies have examined the utility of this model in the OCI-R, with the vast majority of the studies so far mainly considering the six-factor correlated structure both in clinical (Abramowitz & Deacon, 2006;Belloch et al, 2013), non-clinical (Faria & Cardoso, 2017;Fullana et al, 2005;Hajcak et al, 2004;Malpica et al, 2009;Ólafsson et al, 2013;Roberts & Wilson, 2008;Zermatten et al, 2006) and both types of samples (Sica et al, 2009;Solem et al, 2010;Souza et al, 2011;Williams et al, 2013).…”