2.Paldy, L.G.: No time for complacency. J. Coll. Sci. Teach. 35, 4–5 (2005).
3.Nicholls, G.M., Wolfe, H., Besterfield-Sacre, M., Shuman, L.J., and Larpkiattaworn, S.: A method for identifying variables for predicting STEM enrollment. J. Eng. Educ. 96, 33–44 (2007).
4.Cannady, M.A., Greenwald, E., and Harris, K.N.: Problematizing the STEM pipeline metaphor: is the STEM pipeline metaphor serving our students and the STEM workforce? Sci. Educ. 98, 443–460 (2014).
5.Bryan, R.R., Glynn, S.M., and Kittleson, J.M.: Motivation, achievement, and advanced placement intent of high school students learning science. Sci. Educ. 95, 1049–1065 (2011).
6.Hofstein, A. and Lunetta, V.N.: The laboratory in science education: foundations for the twenty-first century. Sci. Educ. 88, 28–54 (2003).
7.Tai, R.H., Liu, C.Q., Maltese, A.V., and Fan, X.: Planning early for careers in science. Science 312, 1143–1144 (2006).
8.Kokkelenberg, E.C. and Sinha, E.: Who succeeds in STEM studies? An analysis of Binghamton University undergraduate students. Econ. Educ. Rev. 29, 935–946 (2010).
9.Hall, C., Dickerson, J., Batts, D., Kauffmann, P., and Bosse, M.: Are we missing opportunities to encourage interest in STEM fields? J. Technol. Educ. 23, 32–46 (2011).
10.Sanders, M.: STEM, STEM education, STEMmania. Technol. Teach. 68, 20–25 (2009).
11.Bleicher, R.E.: High school students learning science in university research laboratories. J. Res. Sci. Teach. 33, 1115–1133 (1996).
12.Seymour, E. and Hewitt, N.M.: Talking about leaving: why undergraduates leave the sciences (Westview, Boulder, CO, 1997).
13.Hathaway, R.S., Nagda, B.R., and Gregerman, S.R.: The relationship of undergraduate research participation to graduate and professional education pursuit: an empirical study. J. Coll. Stud. Dev. 43, 1–18 (2002).
14.Abraham, L.M.: What do high school science students gain from field-based research apprenticeship programs? Clearing House 75, 229–232 (2002).
15.Townsend, M.A.R. and Hicks, L.: Classroom goal structures, social satisfaction, and the perceived value of academic tasks. Br. J. Educ. Psychol. 67, 1–12 (1997).
16.Sadler, T.D., Burgin, S., McKinney, L., and Ponjuan, L.: Learning science through research apprenticeships: a critical review of the literature. J. Res. Sci. Teach. 47, 235–256 (2010).