\begin{thebibliography}{}

\bibitem[\protect\astroncite{{R Development Core Team}}{2012}]{R}
{R Development Core Team} (2012).
\newblock {\em R: A Language and Environment for Statistical Computing}.
\newblock R Foundation for Statistical Computing, Vienna, Austria.
\newblock {ISBN} 3-900051-07-0.

\bibitem[\protect\astroncite{Revelle}{2013}]{psych}
Revelle, W. (2013).
\newblock {\em psych: Procedures for Personality and Psychological Research}.
\newblock Northwestern University, Evanston,
  http://cran.r-project.org/web/packages/psych/.
\newblock R package version 1.3.1.

\end{thebibliography}
