• Open Access

Inventory for the assessment of representational competence of vector fields

Stefan Küchemann, Sarah Malone, Peter Edelsbrunner, Andreas Lichtenberger, Elsbeth Stern, Ralph Schumacher, Roland Brünken, Andreas Vaterlaus, and Jochen Kuhn
Phys. Rev. Phys. Educ. Res. 17, 020126 – Published 1 October 2021

Abstract

Representational competence is essential for the acquisition of conceptual understanding in physics. It enables the interpretation of diagrams, graphs, and mathematical equations, and relating these to one another as well as to observations and experimental outcomes. In this study, we present the initial validation of a newly developed cross-contextual assessment of students’ competence in representing vector-field plots and field lines, the most common visualization of the concept of vector fields. The Representational Competence of Fields Inventory (RCFI) consists of ten single choice items and two items that each contain three true or false questions. The tool can be easily implemented within an online assessment. It assesses the understanding of the conventions of interpreting field lines and vector-field plots, as well as the translation between these. The intended use of the tool is both to scale students’ representational competences in respect to representations of vector fields and to reveal related misconceptions (areas of difficulty). The tool was administered at three German-speaking universities in Switzerland and Germany to a total of 515 first- and third-semester students from science, technology, engineering, and mathematics subjects. In these first steps of the validation of the RCFI, we evaluated its psychometric quality via classical test theory in combination with Rasch scaling and examined its construct validity by conducting student interviews. The RCFI exhibits a good internal consistency of ω=0.86, and the results of the Rasch analysis revealed that the items discriminate well among students from lower to medium-high competence levels. The RCFI revealed several misunderstandings and shortcomings, such as the confusion of the conventions for representing field lines and vector-field plots. Moreover, it showed that many students believed that field lines must not exhibit a curvature, that the lengths of field lines matter, and that field lines may have sharp corners. In its current version, the RCFI allows assessing students’ competence to interpret field representations, a necessary prerequisite for learning the widespread concept of vector fields. We report on planned future adaptations of the tool, such as optimizing some of the current distractors.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
8 More
  • Received 11 February 2021
  • Accepted 24 August 2021

DOI:https://doi.org/10.1103/PhysRevPhysEducRes.17.020126

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Physics Education Research

Authors & Affiliations

Stefan Küchemann1,*, Sarah Malone2, Peter Edelsbrunner3, Andreas Lichtenberger4, Elsbeth Stern3, Ralph Schumacher5, Roland Brünken2, Andreas Vaterlaus4, and Jochen Kuhn1

  • 1Department of Physics, TU Kaiserslautern, Erwin-Schrödinger Str. 46, 67663 Kaiserslautern, Germany
  • 2Department of Education, Saarland University, Campus A 4.2., 66121 Saarbrücken, Germany
  • 3Department of Humanities, ETH Zürich, Clausiusstrasse 59, 8092 Zürich, Switzerland
  • 4Department of Physics, ETH Zürich, John-von-Neumann-Weg 9, 8093 Zürich, Switzerland
  • 5MINT-Learning Center, ETH Zürich, Clausiusstrasse 59, 8092 Zürich, Switzerland

  • *s.kuechemann@physik.uni-kl.de

Article Text

Click to Expand

References

Click to Expand
Issue

Vol. 17, Iss. 2 — July - December 2021

Reuse & Permissions
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Physics Education Research

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

×

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×