Adding the updated README file, simulated data files, finalized scrip…

…t for each model, and intro to tutorial page

.gitignore

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-# History files
-.Rhistory
-.Rapp.history
-
-# Session Data files
-.RData
-.RDataTmp
-
-# User-specific files
-.Ruserdata
-
-# Example code in package build process
-*-Ex.R
-
-# Output files from R CMD build
-/*.tar.gz
-
-# Output files from R CMD check
-/*.Rcheck/
-
-# RStudio files
-.Rproj.user/
-
-# produced vignettes
-vignettes/*.html
-vignettes/*.pdf
-
-# OAuth2 token, see https://github.com/hadley/httr/releases/tag/v0.3
-.httr-oauth
-
-# knitr and R markdown default cache directories
-*_cache/
-/cache/
-
-# Temporary files created by R markdown
-*.utf8.md
-*.knit.md
-
-# R Environment Variables
-.Renviron
-
-# translation temp files
-po/*~
-
-# RStudio Connect folder
-rsconnect/
+# History files
+.Rhistory
+.Rapp.history
+
+# Session Data files
+/output
+.RData
+.RDataTmp
+
+# User-specific files
+.Ruserdata
+
+# Example code in package build process
+*-Ex.R
+
+# Output files from R CMD build
+/*.tar.gz
+
+# Output files from R CMD check
+/*.Rcheck/
+
+# RStudio files
+.Rproj.user/
+
+# produced vignettes
+vignettes/*.html
+vignettes/*.pdf
+
+# OAuth2 token, see https://github.com/hadley/httr/releases/tag/v0.3
+.httr-oauth
+
+# knitr and R markdown default cache directories
+*_cache/
+/cache/
+
+# Temporary files created by R markdown
+*.utf8.md
+*.knit.md
+
+# R Environment Variables
+.Renviron
+
+# translation temp files
+po/*~
+
+# RStudio Connect folder
+rsconnect/
+

README.md

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-# Duolingo_paper
+**Repository Overview**
+This repository contains the code and resources associated with the following paper:
+
+    Zopluoglu, C., Lockwood, J.R. (under review). A Comparative Study of Item Response Theory Models for Mixed Discrete-Continuous Responses. Journal of Intelligence.
+
+For a tutorial-style introduction to the analyses conducted in the paper, please visit: https://czopluoglu.github.io/Duolingo_paper/
+
+**Directory Structure and Contents**
+
+1. **/data/**:
+
+    - Contains simulated datasets in both long and wide formats for the Beta, Simplex, and SB IRT models.
+
+2. **/script/beta_irt/**:
+    - R script for simulating the dataset based on the Beta IRT model.
+
+    - Scripts for fitting the model in Stan and evaluating model fit using posterior predictive checks.
+
+    - Includes the Stan model syntax (beta.stan) and its compiled version for the cmdstanr package.
+
+3. **/script/simplex_irt/:**
+
+    - R script for simulating the dataset based on the Simplex IRT model.
+
+    - Scripts for fitting the model in Stan and evaluating model fit using posterior predictive checks.
+
+    - Includes the Stan model syntax (simplex.stan) and its compiled version for the cmdstanr package.
+
+4. **/script/sb_irt/:**
+
+    - R script for simulating the dataset based on the SB IRT model.
+
+    - Scripts for fitting the model in Stan and evaluating model fit using posterior predictive checks.
+
+    - Includes the Stan model syntax (sb.stan) and its compiled version for the cmdstanr package.
+
+5. **/docs/:**
+
+    - Contains the Rmarkdown file and the rendered HTML for the tutorial page.