r-cran-psych - 1.8.12-1 main

This GNU R package provides a general purpose toolbox for personality,
psychometric theory and experimental psychology. Functions are primarily
for multivariate analysis and scale construction using factor
analysis, principal component analysis, cluster analysis and
reliability analysis, although others provide basic descriptive
statistics. Item Response Theory is done using factor analysis of
tetrachoric and polychoric correlations. Functions for analyzing
data at multiple levels include within and between group
statistics, including correlations and factor analysis. Functions
for simulating and testing particular item and test structures are
included. Several functions serve as a useful front end for
structural equation modeling. Graphical displays of path diagrams,
factor analysis and structural equation models are created using
basic graphics. Some of the functions are written to support a
book on psychometric theory as well as publications in personality
research.