“…The research studies on students in science, mathematics, and engineering at the secondary (Carlone, 2003;Drake, Clewell, & Sevo, 2002;Spears, Dyer, Franks, & Montelone, 2004) and postsecondary levels (Huang & Brainard, 2001;Hughes, 2000;Wyer, 2003) are extensive in theoretical and conceptual approaches. For instance, the application of the differential coursework hypothesis (Ethington & Wolfle 1984, 1986Nora & Horvath, 1990;Nora & Rendón, 1990;Pallas & Alexander, 1983), the spatial visualization (Fennema & Sherman, 1977;Sherman, 1980Sherman, , 1982Sherman, , 1983, the expectancy-value theory (Lips, 1995), and the college impact on retention (Pascarella, Smart, Ethington, & Nettles, 1987) were used in the past studies.…”