Presented at the Conference on Test Security 2022

This presentation will compare the results of multiple score similarity indices to an approximation score similarity index (aSSI) (Smith 2021, 2022). The goal of the study is to determine if aSSI produces similar results to other score similarity indices when applied to real data. Prior research has shown that aSSI does a reasonably good job of producing results similar to true score similar index (SSI) analyses (Smith 2021, 2022), the latter of which uses item response theory (IRT) and the generalized binomial model. However, research is lacking on the practical comparison of aSSI to other similarity indices on real data. The outcome of this study will be recommendations for practitioners on when to apply the aSSI method to real data and how it compares to other existing and more complicated methods.


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