vampyr is a R package developed to fit the Exploratory Factor Analysis model controlling Social Desirability and Acquiescence, based on the method described on Ferrando, Lorenzo-Seva, & Chico (2009).

It is available through CRAN using the following link:

https://cran.r-project.org/package=vampyr

In this website, the user can find the reference manual, including a detailed documentation about the package and its usage.

The basic steps are to install the package and to make it available during the analysis session. To install vampyr within R, use the following function:

>install.package(“vampyr”)

To use the package during the analysis, load the package into the R session using the function:

>library(“vampyr”)