CDM (version 1.4-16)

skill.cor: Tetrachoric correlations between attributes

Description

This function takes the results of din or gdina and computes tetrachoric correlations between attributes.

Usage

skill.cor(object)

Arguments

object

Object of class din or gdina

Examples

# estimate model
d4 <- din(sim.dino, q.matr = sim.qmatrix)
# compute tetrachoric correlations
skill.cor(d4)
## estimated tetrachoric correlations
##   $cor.skills
##             V1        V2        V3
##   V1 1.0000000 0.2567718 0.2552958
##   V2 0.2567718 1.0000000 0.9842188
##   V3 0.2552958 0.9842188 1.0000000