Development and Calibration of Physics Items to Create an Item Bank, using the Rasch Measurement Model

By Joseph N. Njiru and Joe Romanoski.

Published by The Learner Collection

Format Price
Article: Print $US10.00
Article: Electronic $US5.00

This report describes the development and calibration of Physics items from Tertiary Entrance Exam (TEE) in Western Australia to create a Physics Item Bank. Physics Item from 1997 to 2006 TEE were screened using the Rasch measurement model. Only items that fitted the strict Rasch measurement criteria, particularly thresholds, were included in the item bank. Item Residuals and Chi-square were also scrutinised. Further, specialist experts in the subject area were asked to scrutinise the items in order to understand qualitative properties of the items, such as item wording. Physics experts were also asked to provide item descriptors, and unit area within which each item was aligned to. An item bank of 174 items was created. Teachers can design tests from the item bank using a variety of options such as by unit area, topic or item location (difficulty). Item bank could be used by teachers for practice in their classrooms or to develop class assessments for students and/or for classroom diagnostic purposes.

Keywords: Physics, Item Bank, Rasch Measurement

The International Journal of Learning, Volume 14, Issue 2, pp.19-30. Article: Print (Spiral Bound). Article: Electronic (PDF File; 597.909KB).

Dr. Joseph N. Njiru

Research and Measurement Officer, Assessment and Moderation, Curriculum Council of Western Australia, Australia

Before completing his PhD in Educational Psychology and Measurement, at the University of Western Australia, Dr. Joseph N. Njiru was involved in classroom teaching and school adminstration in Kenya, Malaysia, Botswana and Australia, at secondary and tertiary levels. He has also worked as a Youth Services coordinator in Nairobi, Kenya. His main research interests are in measurement of psychological variables using the Rasch model, Classroom Pedagogy, Asessment and Evaluation, ICT use in Education, Computer Adaptive Testing (CAT) and Research methods. Joseph is currently a Research and Measurement officer at the Curriculum Council of Western Australia.

Dr. Joe Romanoski

Research and Measurement Officer, Assessment and Moderation, Curriculum Council of Western Australia, Australia

Dr Romanoski is a former Australian Research Council funded Research Associate in the Curtin University of Technology Department of Education. His research and consultancy centre on Rasch measurement (RUMM), structural equation modeling (LISREL), and hierarchial linear modelling (HLM). He has national and international publications and conference papers on psychometric measurement and data analysis. Most recent projects include a large-scale investigation of school leadership, classroom learning and teaching, and ICT use in the Western Australian Canning Education District. Previous projects included computer-simulated testing of statistical algorithms and evaluation of computerised data analysis systems. Dr Romanoski’s expertise in measurement has developed through many years of collaboration with internationally recognised psychometricians in Australia and the USA.


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