Description Usage Arguments Value Examples
This function returns the model-predicted probability of correct response of one item for one person given the item parameters, Q vector, and alpha vector. Currently supported cognitive diagnostic models include the DINA model, DINO model, NIDA model, G-NIDA model, and R-RUM model. This function is called by the ItemFit
function in the package.
1 |
Q |
The Q-vector of the item. Columns represent attributes. 1=attribute required by the item, 0=attribute not required by the item. |
par |
A list of parameters.
DINA & DINO — |
alpha |
A vector of examinee ability profile. 1=examinee masters the attribute, 0=examinee does not master the attribute. |
model |
Currently supports five models: |
P |
The probability of correct response for the item by the person. |
1 2 3 4 5 6 7 8 |
Loading required package: BB
Loading required package: R.oo
Loading required package: R.methodsS3
R.methodsS3 v1.7.1 (2016-02-15) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.21.0 (2016-10-30) successfully loaded. See ?R.oo for help.
Attaching package: 'R.oo'
The following objects are masked from 'package:methods':
getClasses, getMethods
The following objects are masked from 'package:base':
attach, detach, gc, load, save
[1] 0.8
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