*46%*:**Design and validation of the Quantum Mechanics Conceptual Survey***38%*:**Validation and administration of a conceptual survey on the formalism and postulates of quantum mechanics***36%*:**Quantum mechanics concept assessment: Development and validation study***34%*:**Quantum Mechanics Survey (QMS)***34%*:**Investigating student understanding of basic quantum mechanics in the context of time-dependent perturbation theory***34%*:**Development and validation of a sequence of clicker questions for helping students learn addition of angular momentum in quantum mechanics***34%*:**Designing, validating, and contrasting conceptual quantum mechanics questions for spin states and spatial wave functions***34%*:**Development, validation and in-class evaluation of a sequence of clicker questions on Larmor precession of spin in quantum mechanics***33%*:**Transforming Upper-Division Quantum Mechanics: Learning Goals and Assessment***32%*:**Transfer of Learning in Quantum Mechanics***31%*:**The Quantum Mechanics of Two and Three Dimensional Nano-Structures***31%*:**Dynamics of Student Modeling: A Theory, Algorithms, and Application to Quantum Mechanics***31%*:**Faculty Disagreement about the Teaching of Quantum Mechanics***30%*:**Assessing and improving student understanding of quantum mechanics***30%*:**Improving Students' Understanding of Quantum Mechanics***29%*:**Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey***29%*:**Investigating Student Difficulties with Time dependence of Expectation Values in Quantum Mechanics***28%*:**Surveying students' understanding of quantum mechanics in one spatial dimension***28%*:**Student difficulties with determining expectation values in quantum mechanics**