| ideal.response.pattern {CDM} | R Documentation |
This function computes the ideal response pattern which is the latent item response η_{lj}=∏_{k=1}^K α_{lk} for a person with skill profile l at item j.
ideal.response.pattern(q.matrix, skillspace=NULL)
q.matrix |
The Q-matrix |
skillspace |
An optional skill space matrix. If it is not provided, then all skill classes are used for creating an ideal response pattern. |
A list with following entries
idealresp |
A matrix with ideal response patterns |
skillspace |
Used skill space |
#############################################################################
# EXAMPLE 1: Ideal response pattern sim.qmatrix
#############################################################################
data(sim.qmatrix, package="CDM")
q.matrix <- sim.qmatrix
CDM::ideal.response.pattern( q.matrix )
# compute ideal responses for a reduced skill space
skillspace <- matrix( c( 0,1,0,
1,1,0 ), 2,3, byrow=TRUE )
CDM::ideal.response.pattern( q.matrix, skillspace=skillspace)