item.common | R Documentation |
item.common
is a generic function which extracts the estimates of the
item parameters on the scale of the base form, which is obtained using
the item parameter estimates across all forms.
item.common(x, ...)
## S3 method for class 'mlteqc'
item.common(x, ...)
x |
object of the class |
... |
further arguments passed to or from other methods. |
A data frame containing item names (Item
),
estimated value of the item parameter (Estimate
)
and its standard error (StdErr
).
Michela Battauz
itm
, multiec
data(est2pl)
# prepare the data
mods <- modIRT(coef = est2pl$coef, var = est2pl$var, display = FALSE)
# Estimation of the equating coefficients with the multiple item response function method
eqIRF <- multiec(mods = mods, base = 1, method = "irf")
# estimates of the item parameters on the scale of the base form
item.common(eqIRF)
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