read.bilog {plink}R Documentation

Import Parameters from IRT Software

Description

This function imports item and/or ability parameters from BILOG-MG and PARSCALE.

Usage

read.bilog(file, ability=FALSE, pars.only=TRUE, as.irt.pars=FALSE)

read.parscale(file, ability=FALSE, pars.only=TRUE, as.irt.pars=FALSE, loc.out=TRUE)

Arguments

file filename of .PAR or .SCO file to be imported
ability if TRUE, file is an .SCO file
pars.only if TRUE, only the item parameters will be imported (i.e., any other information like standard errors will be dropped)
as.irt.pars if TRUE, the parameters will be output as an irt.pars object (this is only applicable to item parameters)
loc.out if TRUE, the step/threshold parameters will be reformated to be deviations from a location parameter

Value

Returns a data.frame or an object of class irt.pars if as.irt.pars = TRUE.

Note

These functions are currently unable to handle output generated when subtests are used.

Author(s)

Jonathan P. Weeks weeksjp@gmail.com


[Package plink version 0.1-1 Index]