This project contains two folders. The first folder, Supplementary Materials, contains all necessary files to either replicate or completely reproduce the simulation study for the Master thesis "Assessing Fit of Item Theory Response Models using a Multiple Group Likelihood Ratio Test and Fit Indices" by Nina van Gerwen under supervision of Dr. Dave Hessen. Software requirements for this are R (https://www.r-project.org/) and multiple R packages. All code is annotated. The second folder, Manuscript files, contains the files necessary to knit the manuscript for my Master thesis and an already knitted version. Below you find a table that gives more detailed information on all included files per folder.
| Files/Folders | Description |
|---|---|
| Empirical-Example.rmd | Rmarkdown file to run the analyses performed in the empirical example |
| Empirical-Example.html | Knitted version of the 'Empirical-Example.rmd' file that also contains session information under which the analyses were run |
| Functions | Folder that contains annotated functions used in the different simulation studies and empirical example |
| Simulation-Study-I-FI.rmd | Rmarkdown file that contains the simulation which assessed the performance of the Tucker Lewis Index, Identity Coefficient Fit Index and Comparative Fit Index to detect model missspecification |
| Simulation-Study-I-FI.html | Knitted version of the 'Simulation-Study-I-FI.rmd' file that also contains session information under which the simulation was run |
| Simulation-Study-I-GoF.rmd | Rmarkdown file that contains the simulation which assessed the performance of the Multiple Group Likelihood Ratio, Chi-square difference and Pearson's chi-square test to detect model missspecification |
| Simulation-Study-I-GoF.html | Knitted version of the 'Simulation-Study-I-GoF.rmd' file, which also contains session information under which the simulation was run |
| Simulation-Study-II.rmd | Rmarkdown file that contains the simulation which assessed the performance of the Multiple Group Likelihood Ratio test to discern group differences |
| Simulation-Study-II.html | Knitted version of the 'Simulation-Study-II.html' file that also contains session information under which the simulation was run |
The results found in the .html files were used in the end product of the manuscript.
| Files/Folders | Description |
|---|---|
| Manuscript.tex | Tex file that when knitted in LaTeX replicates the manuscript for my Master thesis |
| Manuscript.pdf | Knitted version of 'Manuscript.tex' |
| reportref.bib | Bibliography file that contains information for the references used in 'Manuscript.tex' |
| sagej.cls | A class file that is necessary to create a LaTeX file according to SAGE standards for the Journal of Applied Psychological Measurement |
For any help with the files in this archive, please contact Nina van Gerwen (n.l.vangerwen@students.uu.nl)