principles and practice of sem, 5th ed. rex b. kline, guilford press, 2023 all syntax, data, and output files for analysis examples in this book can be opened with any basic text editor such as Windows Notepad, among others that is, no special software other than a text editor is needed to view the contents of any file syntax files (*.r) for all examples were run under R for Windows, Version for R-4.4.2, to generate the output files (*.out) versions of R are also available for macOS and Linux (Debian, Fedora/Redhat, Ubuntu) the R environment for statistical computing and graphics and packages for R are all free; for more information see https://cran.r-project.org/