if (FALSE) {
# loading data
data(GMATtest, GMATkey)
Data <- GMATtest[, 1:20] # items
group <- GMATtest[, "group"] # group membership variable
key <- GMATkey # correct answers
# testing both DDF effects
(x <- ddfMLR(Data, group, focal.name = 1, key))
# AIC, BIC, log-likelihood
AIC(x)
BIC(x)
logLik(x)
# AIC, BIC, log-likelihood for the first item
AIC(x, item = 1)
BIC(x, item = 1)
logLik(x, item = 1)
}
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