Abstract
The validity of vertical equating relies on the common items, present in the different Year-level tests,
showing fit to the model and exhibiting no differential item functioning. In this thesis, two empirical
data sets are re-analysed to investigate different approaches to conducting vertical equating for
investigating item functioning using the Rasch model. The major objectives are: to study the
efficiency of a simultaneous analysis of both year groups compared to separate analyses of each
year group; and to investigate a novel approach to equating where only the common items are
analysed initially, followed by a simultaneous analysis of all items.
showing fit to the model and exhibiting no differential item functioning. In this thesis, two empirical
data sets are re-analysed to investigate different approaches to conducting vertical equating for
investigating item functioning using the Rasch model. The major objectives are: to study the
efficiency of a simultaneous analysis of both year groups compared to separate analyses of each
year group; and to investigate a novel approach to equating where only the common items are
analysed initially, followed by a simultaneous analysis of all items.
Original language | English |
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Qualification | Masters |
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Award date | 11 Jul 2023 |
DOIs | |
Publication status | Unpublished - 2023 |