Information summarizing measurement quality of the test and test targeting.
Usage
test_prop(object)
Value
a list containing:
Separation reliability
the person separation reliability as calculated in package eRm for objects of class "Rm".
Test difficulty
person value with an expected score equal to half of the maximum score.
Test target
person value where test information is maximized.
Test information
maximal value of the test information
Arguments
object
An object of class "Rm", a fitted Rasch model or partial
credit model using the functions RM or PCM in package eRm, or an object of class "pcmodel",
a fitted partial credit model using the function pcmodel in package psychotools.
Author
Marianne Mueller
References
Christensen, K. B. , Kreiner, S. & Mesbah, M. (Eds.)
Rasch Models in Health. Iste and Wiley (2013), pp. 63 - 70.