“…Although the factorial structure of the YSQ may differ slightly from study to study, between 12 and 15 EMS have been identified by factor analysis for the questionnaires that included 15 to 16 EMS (Lee, Taylor, & Dunn, 1999;Rijkeboer & van den Bergh, 2006;Stopa, Thorne, Waters, & Preston, 2001;Waller, Meyer, & Ohanian, 2001;Welburn, Coristine, Dagg, Pontefract, & Jordan, 2002). Nevertheless, when using the third version of the YSQ composed of 18 EMS (YSQ-S3R; Young, 2005aYoung, , 2005b, all of these 18 EMS were verified via factor analysis (Calvete, Orue, & Gonzalez-Diez, 2013;Hawke & Provencher, 2012;Kriston, Schäfer, Jacob, Härter, & Hölzel, 2013;Lee, Choi, Rim, Won, & Lee, 2015;Saariaho, Saariaho, Karila, & Joukamaa, 2009). In adolescents, EMSs have also been investigated with a shorter form of the YSQ (YSQ-sf; Young, 1998) or an adapted version of the YSQ for adolescents (YSQ-A; Van Vlierberghe et al, 2010).…”