sd.test | R Documentation |
Performs a statistical test to verify if the chain equating coeffients that link the same two forms are equal.
sd.test(ecall)
ecall |
list of objects of class |
An object of class idtest
with components
link |
|
paths |
|
AB |
|
statistic |
|
df |
|
p.value |
Michela Battauz
Battauz, M. (2022). Testing for differences in chain equating. Statistica Neerlandica, 1-12.
# 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 pth3 <- paste("test", 1:5, sep = "") chainec3 <- chainec(direclist = direclist3pl, pths = pth3) # create a list of objects of class eqc or ceqc ecall <- c(chainec3, direclist3pl["test1.test5"]) summary(chainec3) summary(direclist3pl$test1.test5) # test sd.test(ecall)
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