ideal.response.pattern {CDM} | R Documentation |
Ideal Response Pattern
Description
This function computes the ideal response pattern which is the latent
item response \eta_{lj}=\prod_{k=1}^K \alpha_{lk}
for a person
with skill profile l
at item j
.
Usage
ideal.response.pattern(q.matrix, skillspace=NULL, rule="DINA")
Arguments
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. |
rule |
Chosen condensation rule for the CDM. Can be |
Value
A list with following entries
idealresp |
A matrix with ideal response patterns |
skillspace |
Used skill space |
Examples
#############################################################################
# EXAMPLE 1: Ideal response pattern sim.qmatrix
#############################################################################
data(sim.qmatrix, package="CDM")
q.matrix <- sim.qmatrix
#- ideal response pattern for DINA model
CDM::ideal.response.pattern(q.matrix)
#- ideal response pattern for DINO model
CDM::ideal.response.pattern( q.matrix, rule="DINO" )
# 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)
[Package CDM version 8.2-6 Index]