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

Author(s)

Phil Chalmers rphilip.chalmers@gmail.com

References

Reckase, M. D. (2009). Multidimensional Item Response Theory. Springer.

See Also

extract.group

Examples

## Not run: 

mod <- mirt(Science, 2)
MDISC(mod)


## End(Not run)