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Full-Text Articles in Science and Mathematics Education
Impulse-Momentum Diagrams, David Rosengrant
Impulse-Momentum Diagrams, David Rosengrant
Faculty and Research Publications
Multiple representations are a valuable tool to help students learn and understand physics concepts. Furthermore, representations help students learn how to think and act like real scientists. These representations include: pictures, free‐body diagrams, energy bar charts, electrical circuits, and, more recently, computer simulations and animations. However, instructors have limited choices when they want to help their students understand impulse and momentum. One of the only available options is the impulse‐momentum bar chart. The bar charts can effectively show the magnitude of the momentum as well as help students understand conservation of momentum, but they do not easily show the actual …
Testing The Test: Item Response Curves And Test Quality, Gary A. Morris, Lee Branum-Martin, Nathan Harshman, Stephen D. Baxter, Eric Mazur, Suvendra Dutta, Taha Mzoughi, Veronica Mccauley
Testing The Test: Item Response Curves And Test Quality, Gary A. Morris, Lee Branum-Martin, Nathan Harshman, Stephen D. Baxter, Eric Mazur, Suvendra Dutta, Taha Mzoughi, Veronica Mccauley
Faculty and Research Publications
We present a simple technique for evaluating multiple-choice questions and their answers beyond the usual measures of difficulty and the effectiveness of distractors. The technique involves the construction and qualitative consideration of item response curves and is based on item response theory from the field of education measurement. To demonstrate the technique, we apply item response curve analysis to three questions from the Force Concept Inventory. Item response curve analysis allows us to characterize qualitatively whether these questions are efficient, where efficient is defined in terms of the construction, performance, and discrimination of a question and its answer choices. This …