Inventory for the Assessment of Representational Competence of Vector Fields

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Autor/inn/en	Küchemann, Stefan; Malone, Sarah; Edelsbrunner, Peter; Lichtenberger, Andreas; Stern, Elsbeth; Schumacher, Ralph; Brünken, Roland; Vaterlaus, Andreas; Kuhn, Jochen
Titel	Inventory for the Assessment of Representational Competence of Vector Fields
Quelle	In: Physical Review Physics Education Research, 17 (2021) 2, Artikel 020126 (25 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Küchemann, Stefan) ORCID (Malone, Sarah) ORCID (Lichtenberger, Andreas)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	2469-9896
Schlagwörter	Physics; Science Instruction; Teaching Methods; Concept Formation; Scientific Concepts; Visual Aids; Graphs; Equations (Mathematics); Item Analysis; Measures (Individuals); Computer Assisted Testing; Misconceptions; Undergraduate Students; German; STEM Education; Psychometrics; Construct Validity; Student Attitudes; Prerequisites; Algebra; Geometric Concepts; Item Response Theory; Foreign Countries; Switzerland + Suchen Sie Ihr Suchwort? Physik; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Teaching method; Lehrmethode; Unterrichtsmethode; Concept learning; Begriffsbildung; Anschauungsmaterial; Grafische Darstellung; Equations; Mathematics; Gleichungslehre; Itemanalyse; Messdaten; Missverständnis; Deutscher; STEM; Psychometry; Psychometrie; Schülerverhalten; Voraussetzung; Elementare Geometrie; Item-Response-Theorie; Ausland; Schweiz
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 [omega] = 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. (As Provided).
Anmerkungen	American Physical Society. One Physics Ellipse 4th Floor, College Park, MD 20740-3844. Tel: 301-209-3200; Fax: 301-209-0865; e-mail: assocpub@aps.org; Web site: http://prst-per.aps.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01