“…Nevertheless, a parallel research progression has occurred, with research on both issues focusing initially on background variables such as gender (Sells, 1976(Sells, , 1980 and socioeconomic background (e.g., Blau & Duncan, 1967). Researchers then began incorporating into their studies factors thought to mediate the effect of these background variables, such as achievement and psychosocial factors (e.g., Camp, Gilleland, Pearson, & Putten, 2009;Eccles, 1994;Schoon, Ross, & Martin, 2007;Sewell, Haller, & Portes, 1969).…”