“…Connalley, 1997;Dornyei & Katona, 1992;Eckes & Grotjahn, 2006;Grotjahn, 1992Grotjahn, , 1994Grotjahn, , 1996Grotjahn, , 2002Grotjahn, , 2006Grotjahn, , 2010Klein-Braley, 1997;Klein-Braley & Raatz, 1984;Sigotte, 2004). However, few studies have been done about its merits such as lack of face validity (Bradshaw, 1990;Jafarpur, 1995;Kontra & Kormos, 2006), poor item discrimination (Cleary, 1988;Kamimoto, 1993;Sigotte & Korbel, 1996), and more importantly, unclear construct validity (Grotjahn, 1986;Jafarpur, 1995;Kamimoto, 1992).…”