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Traxler, Adrienne; Henderson, Rachel; Stewart, John; Stewart, Gay; Papak, Alexis; Lindell, Rebecca – Physical Review Physics Education Research, 2018
Research on the test structure of the Force Concept Inventory (FCI) has largely ignored gender, and research on FCI gender effects (often reported as "gender gaps") has seldom interrogated the structure of the test. These rarely crossed streams of research leave open the possibility that the FCI may not be structurally valid across…
Descriptors: Physics, Science Instruction, Sex Fairness, Gender Differences
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Stewart, John; Zabriskie, Cabot; DeVore, Seth; Stewart, Gay – Physical Review Physics Education Research, 2018
Research on the test structure of the Force Concept Inventory (FCI) has largely been performed with exploratory methods such as factor analysis and cluster analysis. Multidimensional Item Response Theory (MIRT) provides an alternative to traditional exploratory factor analysis which allows statistical testing to identify the optimal number of…
Descriptors: Item Response Theory, Physics, Science Instruction, Scientific Concepts
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Henderson, Rachel; Stewart, Gay; Stewart, John; Michaluk, Lynnette; Traxler, Adrienne – Physical Review Physics Education Research, 2017
The "gender gap" on various physics conceptual evaluations has been extensively studied. Men's average pretest scores on the Force Concept Inventory and Force and Motion Conceptual Evaluation are 13% higher than women's, and post-test scores are on average 12% higher than women's. This study analyzed the gender differences within the…
Descriptors: Gender Differences, Scientific Concepts, Energy, Magnets
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Stewart, John; DeVore, Seth; Stewart, Gay; Michaluk, Lynnette – Physical Review Physics Education Research, 2016
This study examined the regulation of out-of-class time invested in the academic activities associated with a physics class for 20 consecutive semesters. The academic activities of 1676 students were included in the study. Students reported investing a semester average of 6.5 ± 2.9 h out of class per week. During weeks not containing an…
Descriptors: Physics, Science Instruction, Correlation, Time Management
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DeVore, Seth; Stewart, John; Stewart, Gay – Physical Review Physics Education Research, 2016
Testwiseness is defined as the set of cognitive strategies used by a student that is intended to improve his or her score on a test regardless of the test's subject matter. Questions with elements that may be affected by testwiseness are common in physics assessments, even in those which have been extensively validated and widely used as…
Descriptors: Test Wiseness, Science Tests, Physics, College Students
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Stewart, John; Miller, Mayo; Audo, Christine; Stewart, Gay – Physical Review Special Topics - Physics Education Research, 2012
This study examined the evolution of student responses to seven contextually different versions of two Force Concept Inventory questions in an introductory physics course at the University of Arkansas. The consistency in answering the closely related questions evolved little over the seven-question exam. A model for the state of student knowledge…
Descriptors: Physics, College Science, Scientific Concepts, Science Tests
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Stewart, John; Stewart, Gay; Taylor, Jennifer – Physical Review Special Topics - Physics Education Research, 2012
Student use of out-of-class time was measured for four years in the introductory second-semester calculus-based physics course at the University of Arkansas. Two versions of the course were presented during the time of the measurement. In both versions, the total out-of-class time a student invested in the course explained less than 1% of the…
Descriptors: Physics, Calculus, Introductory Courses, College Science
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Stewart, John; Griffin, Heather; Stewart, Gay – Physical Review Special Topics - Physics Education Research, 2007
The force concept inventory and a 10-question context-modified test were given to 647 students enrolled in introductory physics classes at the University of Arkansas. Context changes had an effect ranging from -3% to 10% on the individual questions. The average student score on the ten transformed questions was 3% higher than the average student…
Descriptors: Mechanics (Physics), College Science, College Students, Science Instruction