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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
This study uses a new psychometric model (The mixture item response theory-MIMIC model) that simultaneously estimates differential item functioning (DIF) across manifest groups and latent classes. Current DIF detection methods...
In this dissertation, a DIF detection method for testlet-based data was developed and evaluated. The proposed DIF model is an extension of a bi-factor multidimensional IRT model for testlets. Unlike other IRT-based DIF detection models, ...
In this dissertation, we discuss the generation of low discrepancy sequences, randomization of these sequences, and the transformation methods to generate normally distributed random variables. Two well known methods for generating...
The focus of this study is to consider random differential item functioning (DIF) for polytomous items from a multilevel (3 level) logistic regression perspective. Often, in educational studies, three levels with nested variables are...
General augmentation techniques such as foldover and semifold have been a common practice in industrial experimentation for many years. Even though these techniques are extremely effective in maintaining balance and orthogonality, they...
When conducting meta-analysis, reviewers gather extensive sets of primary studies for meta-analysis. When we have two or more primary studies by the same author, or two more studies using the same data set, we have the issues we call ...
The purpose of this study was to evaluate the difference in the three dimensions of fabrics under different standard illuminants using portable and table top spectrophotometers. This study were designed to combine a controlled...
Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
