*56%*:**Student difficulties with quantum states while translating state vectors in Dirac notation to wave functions in position and momentum representations***54%*:**Algebra-Based Students and Vector Representations: Arrow vs. ijk***53%*:**Algebra-Based Students & Vectors: Assessing Physical Understanding in Arrow vs ijk***47%*:**Student Understanding of Cross Product Direction and Use of Right-Hand Rules: An Exploration of Representation and Context-Dependence***46%*:**Students' difficulties with unit vectors and scalar multiplication of a vector***46%*:**Testing Studentsâ€™ Understanding of Vector Concepts***46%*:**Student difficulties in translating between mathematical and graphical representations in introductory physics***45%*:**Comparing students' performance on research-based conceptual assessments and traditional classroom assessments***45%*:**Test of understanding of vectors: A reliable multiple-choice vector concept test***44%*:**Comparing Student Learning with Multiple Research-Based Conceptual Surveys: CSEM and BEMA***44%*:**Assessing students' ability to solve introductory physics problems using integrals in symbolic and graphical representations***43%*:**The Use of Multiple Representations and Visualizations in Student Learning of Introductory Physics: An Example from Work and Energy***43%*:**Students' Difficulties in Interpreting the Torque Vector in a Physical Situation***43%*:**Algebra-Based Students & Vectors: Can ijk Coaching Improve Arrow Subtraction?***42%*:**Student Epistemology About Mathematical Integration In A Physics Context: A Case Study***42%*:**Network Analysis of Students' Representation Use in Problem Solving***41%*:**Comparing large lecture mechanics curricula using the Force Concept Inventory: A five thousand student study***40%*:**Studentsâ€™ Responses to Different Representations of a Vector Addition Question***40%*:**Comparing the development of students' conceptions of pulleys using physical and virtual manipulatives**