test_prop: Properties of the Test
In muellermarianne/iarm: Item Analysis in Rasch Models
test_prop R Documentation
Properties of the Test
Description
Information summarizing measurement quality of the test and test targeting.
Usage
test_prop(object)
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.
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
Author(s)
Marianne Mueller
References
Christensen, K. B. , Kreiner, S. & Mesbah, M. (Eds.)
Rasch Models in Health. Iste and Wiley (2013), pp. 63 - 70.
Examples
rm.mod <- RM(amts[,4:13])
test_prop(rm.mod)
muellermarianne/iarm documentation built on Sept. 2, 2022, 10:30 a.m.
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| test_prop | R Documentation |
Properties of the Test
Description
Information summarizing measurement quality of the test and test targeting.
Usage
test_prop(object)
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. |
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 |
Author(s)
Marianne Mueller
References
Christensen, K. B. , Kreiner, S. & Mesbah, M. (Eds.) Rasch Models in Health. Iste and Wiley (2013), pp. 63 - 70.
Examples
rm.mod <- RM(amts[,4:13]) test_prop(rm.mod)
R Package Documentation
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Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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