The preparation of this article was supported by grants from the Howard Hughes Medical Institute Undergraduate Science Education program and the National Science Foundation Course, Curriculum and Laboratory Improvement program (DUE-0942020). This work has been approved by the Institutional Review Board as IRB protocol 375954-5. We thank Jeffrey Harring and Xiaoshu Zhu from the Department of Measurement, Statistics, and Evaluation (EDMS) at the University of Maryland for their assistance in developing the survey. We also thank the undergraduates who participated in this study.