psych: Procedures for Psychological, Psychometric, and Personality Research

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. For more information, see the <> web page.

Depends: R (≥ 2.10)
Imports: mnormt, parallel, stats, graphics, grDevices, methods, foreign, lattice, nlme
Suggests: GPArotation, lavaan, sem, lme4, Rcsdp, graph, Rgraphviz
Published: 2017-03-22
Author: William Revelle
Maintainer: William Revelle <revelle at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Citation: psych citation info
Materials: NEWS
In views: Psychometrics
CRAN checks: psych results


Reference manual: psych.pdf
Vignettes: Introduction to the psych package
Overview of the psych package for psychometrics
input for sem
Package source: psych_1.7.3.21.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Mavericks binaries: r-release: psych_1.7.3.21.tgz, r-oldrel: psych_1.7.3.21.tgz
Old sources: psych archive

Reverse dependencies:

Reverse depends: BinNor, Compind, DeducerPlugInScaling, GAabbreviate, generalCorr, HDMD, mosaicQA, multicon, MultiOrd, nFactors, nonparaeff, orddom, PoisBinOrdNor,, REREFACT, Rz, Scale, SODC, SSDforR, SubLasso
Reverse imports: broom, CCTpack, CDM, CensSpatial, condir, CorrMixed, CorrToolBox, CTTShiny, dtables, evaluator, GeomComb, GSMX, ionr, IRTShiny, jmv, lavaan.shiny, likert, lmSupport, lrmest, lvnet, manifestoR, matrixpls, modeval, mousetrap, multilevelPSA, MVN, neuropsychology, OpenRepGrid, prepdat, PSAboot, psytabs, qgraph, qmethod, qrLMM, qrNLMM, quickReg, QVM, radiant, radiant.basics,, radiant.multivariate, rmcorr, sdmvspecies, ShinyItemAnalysis, sirt, sjmisc, sjPlot, TAM, traj, TriMatch, userfriendlyscience
Reverse suggests: bootnet, EstimateGroupNetwork, FAiR, FinTS, GSIF, pairwise, rattle, REdaS


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