Thesis Detail Page
written by Jason E. Dowd
We present insights into three unique, important avenues of assessment in the physics classroom and laboratory.
First, we examine students' performance on conceptual surveys. The goal is to better utilize the information collected when instructors administer the Force Concept Inventory (FCI) to students as a pre-test and post-test of their conceptual understanding of Newtonian mechanics. We find ambiguities in the use of the normalized gain, g, may influence comparisons among individual classes. Therefore, we propose using stratagrams, graphical summaries of the fraction of students who exhibit "Newtonian thinking," as a clearer, more informative method of assessing a single class and comparing performance among classes.
Next, we examine students' expressions of confusion when they initially encounter new material. The goal is to better understand what such confusion conveys to instructors about students' performance and engagement. We investigate the relationship between students' self-assessment of their confusion and their performance, confidence in reasoning, pre-course self-efficacy and several other measurable characteristics of engagement. We find that students' expressions of confusion are negatively related to initial performance, confidence and self-efficacy, but positively related to final performance when all factors are considered together.
Finally, we examine students' scientific reasoning abilities in the laboratory by exploring two inquiry-based curricula, each of which proposes a different degree of scaffolding. We find that students who participate in the less scaffolded laboratory activity sequences exhibit marginally stronger scientific reasoning abilities in distinct exercises throughout the semester, but exhibit no differences in the final, common exercises. Overall, we find that, although students demonstrate some enhanced scientific reasoning skills, they fail to exhibit or retain even some of the most strongly emphasized skills.
University: Harvard University
Academic Department: Physics
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