equateIRT (version 2.2.0)

id.test: Identity Test

Description

Performs a statistical test to verify if the chain equating coeffients from one form to itself are A=1 and B=0.

Usage

id.test(chain)

Arguments

chain

an object of the class ceqc returned by function chainec.

Value

An object of class idtest with components

path

AB

statistic

df

p.value

Examples

# NOT RUN {
# three-parameter logistic model
# direct equating coefficients using the "Haebara" method
data(est3pl)
test <- paste("test", 1:5, sep = "")
mod3pl <- modIRT(coef = est3pl$coef, var = est3pl$var, names = test, display = FALSE)
direclist3pl <- alldirec(mods = mod3pl, method = "Haebara")
# compute chain equating coefficients for path 1,2,3,4,5,1
pth3 <- paste("test", c(1:5,1), sep = "")
chainec_circle <- chainec(direclist = direclist3pl, pths = pth3)
summary(chainec_circle)
# test
id.test(chainec_circle)
# }