fourPNO: Bayesian 4 Parameter Item Response Model

Estimate Barton & Lord's four parameter IRT model with lower and upper asymptotes using Bayesian formulation described by Culpepper (2015).

Version: 1.0.3
Depends: R (≥ 3.0.1)
Imports: Rcpp
LinkingTo: Rcpp, RcppArmadillo
Published: 2015-12-16
Author: Steven Andrew Culpepper [aut, cre]
Maintainer: Steven Andrew Culpepper <sculpepp at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Citation: fourPNO citation info
CRAN checks: fourPNO results


Reference manual: fourPNO.pdf
Package source: fourPNO_1.0.3.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Snow Leopard binaries: r-release: fourPNO_1.0.3.tgz, r-oldrel: not available
OS X Mavericks binaries: r-release: fourPNO_1.0.3.tgz
Old sources: fourPNO archive