mirt (version 1.14)

MDIFF: Compute multidimensional difficulty index

Description

Returns a matrix containing the MDIFF values (Reckase, 2009).

Usage

MDIFF(x)

Arguments

x

an object of class 'SingleGroupClass'

References

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

See Also

extract.group, MDISC

Examples

# NOT RUN {
mod <- mirt(Science, 2)
MDIFF(mod)

# }