Merge pull request #72 from zhanglj37/main

make the environment (renv.lock) back to the version before diffsim

Author: ben-domingue

diffsim.qmd

@@ -12,6 +12,8 @@ Before simulation, we estimated item difficulties and their uncertainties across
 The `irw_simu_diff()` function draws samples directly from these empirically derived distributions, rather than assuming a normal or uniform form, thereby generating realistic difficulty parameters that reflect both observed variability and estimation uncertainty.
 
 ```{r, eval=FALSE}
+#| eval: false
+#| echo: true
 # download the package
 devtools::install_github("itemresponsewarehouse/Rpkg") 
 
@@ -42,6 +44,8 @@ The current difficulty pool includes 145 datasets from IRW (as of 10-2025), cove
 
 
 ```{r, eval=FALSE}
+#| eval: false
+#| echo: true
 # load the difficulty pool from the package
 data("diff_long", package = "irw")