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Download fileLinking and anchoring techniques in test equating using the Rasch model
conference contribution
posted on 2006-05-23, 09:55 authored by Guangzhong Luo, Anthony Seow, Chew Lee ChinIn analyzing computer assisted tests, the comparison between batches of examinees
across different time frames is very important. In real testing situations, though great
effort has been paid to construct parallel tests with the aim to ensure the fairness of the
comparison between different cohorts using different tests, and overlap of test items in
these different tests is often seen, an overall comparison is still not operational due to
the existence of missing blocks in the data. In the traditional test theory (TTT), the
standardization criterion is commonly used for the purpose of comparing the examinees’
achievement. However, the comparison is unarguable only when the examinees are
considered from the same population.
Using the Rasch model in the Item Response Theory (IRT), this paper presents the
Linking and Anchoring techniques for comparing or equating tests. The advantages of
these techniques are (1) the requirement that the examinees must be from same
population is lifted and thus the comparison of examinee performance can be
conducted across different academic levels; (2) the techniques are applicable even
when the historic raw data are not available; and (3) the calibration of items using these
techniques provides essential and comparable indexing reference for item banking.
History
School
- University Academic and Administrative Support
Department
- Professional Development
Research Unit
- CAA Conference
Pages
114399 bytesCitation
LUO, SEOW and CHIN, 2001. Linking and Anchoring Techniques in Test Equating Using the Rasch Model. IN: Proceedings of the 5th CAA Conference, Loughborough: Loughborough UniversityPublisher
© Loughborough UniversityPublication date
2001Notes
This is a conference paper.Language
- en