UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 16:41

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Physics Education


Title:
Comparative analysis of Physics items in 6th grade National Evaluation Tests


Authors:
Gabriela DELIU(1,2), Sabina STEFAN(1)


*
Affiliation:
1)Faculty of Physics, University of Bucharest, P.O.BOX MG–11, Magurele Bucharest, Romania

2)“Emil Racovita” Highschool, Brasov, Romania


E-mail
gabinan_bv@yahoo.com


Keywords:
items, evaluation tests, Item Response Theory, content validity, items discrimination


Abstract:
The aim of the current research is to determine the internal structure of the Physics items present in the 6th grade Romanian National Evaluation Tests. This study also focuses on the items effectiveness in assessing the competences gained by students through the study of Physics. The analysis of the items includes the 2016-2019 tests. The inclusion of the items at the different levels of the construct scale measured by each test is statistically supported by the Categorical Principal Components Analysis and the "Wright Map" tools. The items calibration is performed within the framework of the Item Response Theory. The results show that the items have content validity and have a high discriminatory power. The small number of Physics items in the National Evaluation Tests, as well as the fact that the internal structure of these items is almost identical in all the tests applied over the four years covered by the analysis, determined their low effectiveness in the competences evaluation. This study proposes a useful tool for Physics teachers to interpret the results obtained by their students in the National Evaluation Tests, as it complements the image of these items, given by the National Centre for Assessment and Examination in Evaluator’s Guidebook, with their strengths, but also their limitations.