*80%*:**Analyzing student understanding of vector field plots with respect to divergence***59%*:**Students' difficulties with unit vectors and scalar multiplication of a vector***59%*:**Student thinking about the divergence and curl in mathematics and physics contexts***58%*:**Improving Student Understanding of Vector Fields in Junior-Level E&M***56%*:**Arrows as anchors: Conceptual blending and student use of electric field vector arrows***52%*:**Analysis Of Shifts In Students' Reasoning Regarding Electric Field And Potential Concepts***47%*:**MIT Physics 8.02: Vector Fields Visualizations - Cross Product of Two Vectors***47%*:**Students' Difficulties in Interpreting the Torque Vector in a Physical Situation***46%*:**Student reasoning about electrostatic and gravitational potential energy: An exploratory study with interdisciplinary consequences***44%*:**Student Objections to and Understanding of Non-Cartesian Unit Vector Notation in Upper-Level E&M***43%*:**The kinds of mental representations - models, propositions and images - used by college physics students regarding the concept of field***43%*:**Students' Conceptions About the Vector Characteristics of Three Physics Concepts***43%*:**Confusion by representation: On student's comprehension of the electric field concept***43%*:**Student Preconceptions about Vector Kinematics***43%*:**Investigation of Studentsâ€™ Preconceptions and Difficulties with the Vector Direction Concept at a Mexican University***43%*:**Student Understanding Of Gravitational Potential Energy And The Motion Of Bodies In A Gravitational Field***43%*:**A research-based approach to improving student understanding of the vector nature of kinematical concepts***43%*:**University students' conceptions of the electric and magnetic fields and their interrelationships***43%*:**Student Ideas around Vector Decomposition in the Upper Division**