12.10 Stepwise method (Cont’d)
To conduct Q-matrix validation using stepwise method, change method to “wald” in the Qval function:
Code
stepwise <- Qval(mod1, method = "wald", eps = 0.95)
stepwise##
## Q-matrix validation based on Stepwise Wald test
##
## Suggested Q-matrix:
##
## A1 A2 A3 A4 A5
## 1 1 0 0 0 0
## 2 0 1 0 0 0
## 3 0 0 1 0 0
## 4 0 0 0 1 0
## 5 0 0 0 0 1
## 6 1 0 0 0 0
## 7 0 1 0 0 0
## 8 0 0 1 0 0
## 9 0 0 0 1 0
## 10 0 0 0 0 1
## 11 1 1 0 0 0
## 12 1 0 1 0 0
## 13 1 0 0 1 0
## 14 1 0 0 0 1
## 15 0 1 1 0 0
## 16 0 1 0 1 0
## 17 0 1 0 0 1
## 18 0 0 1 1 0
## 19 0 0 1 0 1
## 20 0 0 0 1 1
## 21 1 1 1 0 0
## 22 1 1 0 1 0
## 23 1 1 0 0 1
## 24 1 0 1 1 0
## 25 1 0 1 0 1
## 26 1 0 0 1 1
## 27 0 1 1 1 0
## 28 0 1 1 0 1
## 29 0 1 0 1 1
## 30 0* 0* 1* 1 1*
## Note: * denotes a modified element.