“…Previous studies have identified a number of factors that contribute to the retention of undergraduates in 4-year colleges and universities in general (see for example Nora, Barlow, & Crisp, 2005;Tinto, 1993;Titus, 2004Titus, , 2006 and STEM fields in particular (Daempfle, 2003;Elliott, Strenta, Adair, Matier, & Scott, 1996;Grandy, 1998;Seymour & Hewitt, 1997;White, Altschuld, & Lee, 2006). Some of the factors that have been shown to contribute to STEM retention include students' high school academic preparation (Elliott et al, 1996), freshmen academic performance and enrollment in "gatekeeper" courses (Crisp, Nora, & Taggart, 2009), personal contact with faculty (Daempfle, 2003), degree of racial isolation (Seymour & Hewitt, 1997), exposure to racial minority support systems (Grandy, 1998), and an institution's level of selectivity (Chang, Cerna, Han, & Sáenz, 2008;Chang et al, 2011;Espinosa, 2011).…”