id.test {equateIRT} | R Documentation |
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 |
Value
An object of class idtest
with components
path |
|
AB |
|
statistic |
|
df |
|
p.value |
Author(s)
Michela Battauz
References
Battauz, M. (2022). Testing for differences in chain equating. Statistica Neerlandica, 1-12.
See Also
Examples
# the following code uses item parameter estimates previously obtained
# for other examples see documentation in function chainec
# 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)
[Package equateIRT version 2.5.0 Index]