fourPNO: Bayesian 4 Parameter Item Response Model

Estimate Barton & Lord's (1981) <doi:10.1002/j.2333-8504.1981.tb01255.x> four parameter IRT model with lower and upper asymptotes using Bayesian formulation described by Culpepper (2016) <doi:10.1007/s11336-015-9477-6>.

Version: 1.1.0
Depends: R (≥ 3.5.0)
Imports: Rcpp (≥ 1.0.0)
LinkingTo: Rcpp, RcppArmadillo (≥ 0.9.200)
Published: 2019-09-24
DOI: 10.32614/CRAN.package.fourPNO
Author: Steven Andrew Culpepper ORCID iD [aut, cre, cph]
Maintainer: Steven Andrew Culpepper <sculpepp at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Citation: fourPNO citation info
Materials: README NEWS
In views: Psychometrics
CRAN checks: fourPNO results


Reference manual: fourPNO.pdf


Package source: fourPNO_1.1.0.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): fourPNO_1.1.0.tgz, r-oldrel (arm64): fourPNO_1.1.0.tgz, r-release (x86_64): fourPNO_1.1.0.tgz, r-oldrel (x86_64): fourPNO_1.1.0.tgz
Old sources: fourPNO archive


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