TestInformationFunc {exametrika} | R Documentation |
TIF for IRT
Description
Test Information Function for 4PLM
Usage
TestInformationFunc(params, theta)
Arguments
params |
parameter matrix |
theta |
ability parameter |
Value
Returns a numeric vector representing the test information at each ability
level theta. The test information is the sum of item information functions for
all items in the test: I_{test}(\theta) = \sum_{j=1}^n I_j(\theta)
[Package exametrika version 1.5.1 Index]