Inventory for the assessment of representational competence of vector fields

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 in...

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Autores principales:	Stefan Küchemann, Sarah Malone, Peter Edelsbrunner, Andreas Lichtenberger, Elsbeth Stern, Ralph Schumacher, Roland Brünken, Andreas Vaterlaus, Jochen Kuhn
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Special aspects of education LC8-6691 Physics QC1-999
Acceso en línea:	https://doaj.org/article/37c6870e1d8f4f8e89429917cea9af9b
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spelling	oai:doaj.org-article:37c6870e1d8f4f8e89429917cea9af9b2021-12-02T17:43:00ZInventory for the assessment of representational competence of vector fields10.1103/PhysRevPhysEducRes.17.0201262469-9896https://doaj.org/article/37c6870e1d8f4f8e89429917cea9af9b2021-10-01T00:00:00Zhttp://doi.org/10.1103/PhysRevPhysEducRes.17.020126http://doi.org/10.1103/PhysRevPhysEducRes.17.020126https://doaj.org/toc/2469-9896Representational 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.Stefan KüchemannSarah MalonePeter EdelsbrunnerAndreas LichtenbergerElsbeth SternRalph SchumacherRoland BrünkenAndreas VaterlausJochen KuhnAmerican Physical SocietyarticleSpecial aspects of educationLC8-6691PhysicsQC1-999ENPhysical Review Physics Education Research, Vol 17, Iss 2, p 020126 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Special aspects of education LC8-6691 Physics QC1-999
spellingShingle	Special aspects of education LC8-6691 Physics QC1-999 Stefan Küchemann Sarah Malone Peter Edelsbrunner Andreas Lichtenberger Elsbeth Stern Ralph Schumacher Roland Brünken Andreas Vaterlaus Jochen Kuhn Inventory for the assessment of representational competence of vector fields
description	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.
format	article
author	Stefan Küchemann Sarah Malone Peter Edelsbrunner Andreas Lichtenberger Elsbeth Stern Ralph Schumacher Roland Brünken Andreas Vaterlaus Jochen Kuhn
author_facet	Stefan Küchemann Sarah Malone Peter Edelsbrunner Andreas Lichtenberger Elsbeth Stern Ralph Schumacher Roland Brünken Andreas Vaterlaus Jochen Kuhn
author_sort	Stefan Küchemann
title	Inventory for the assessment of representational competence of vector fields
title_short	Inventory for the assessment of representational competence of vector fields
title_full	Inventory for the assessment of representational competence of vector fields
title_fullStr	Inventory for the assessment of representational competence of vector fields
title_full_unstemmed	Inventory for the assessment of representational competence of vector fields
title_sort	inventory for the assessment of representational competence of vector fields
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/37c6870e1d8f4f8e89429917cea9af9b
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Inventory for the assessment of representational competence of vector fields

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