MDISC: Compute multidimensional discrimination index
Description
Returns a vector containing the MDISC values for each item in the model input object (Reckase, 2009).
Note that the logistic slope parameters are divided by 1.702 to match the normal ogive metric.
Usage
MDISC(x)
Arguments
x
an object of class 'SingleGroupClass'
References
Reckase, M. D. (2009). Multidimensional Item Response Theory. Springer.