PerFit: Person Fit

Several person-fit statistics (PFSs) are offered. These statistics allow assessing whether individual response patterns to tests or questionnaires are (im)plausible given the other respondents in the sample or given a specified item response theory model. Some PFSs apply to dichotomous data, such as the likelihood-based PFSs (lz, lz*) and the group-based PFSs (personal biserial correlation, caution index, (normed) number of Guttman errors, agreement/disagreement/dependability statistics, U3, ZU3, NCI, Ht). PFSs suitable to polytomous data include extensions of lz, U3, and (normed) number of Guttman errors.

Version: 1.4.1
Depends: R (≥ 2.10), ltm, mirt
Imports: stats, graphics, fda, Hmisc, irtoys, MASS, Matrix
Published: 2016-10-18
Author: Jorge N. Tendeiro
Maintainer: Jorge N. Tendeiro <j.n.tendeiro at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Citation: PerFit citation info
CRAN checks: PerFit results


Reference manual: PerFit.pdf
Package source: PerFit_1.4.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X El Capitan binaries: r-release: PerFit_1.4.1.tgz
OS X Mavericks binaries: r-oldrel: PerFit_1.4.1.tgz
Old sources: PerFit archive


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