api: The Z3 appropriateness index
In lebebr01/irtoys-2: Simple interface to the estimation and plotting of IRT models
Description
Usage
Arguments
Value
Author(s)
References
Examples
Description
Computes the Z3 appropriateness index, a measure of
person fit in IRT models
Usage
1
api(resp, ip, theta)
Arguments
resp
A matrix of responses: persons as rows, items
as columns, entries are either 0 or 1, no missing data
ip
Item parameters: a matrix with one row per
item, and three columns: [,1] item discrimination
a, [,2] item difficulty b, and [,3] asymptote
c.
theta
A measure of ability, typically produced
with mlebme, wle etc. If missing, ML
estimates will be computed automatically.
Value
A vector of length equal to the number of rows in
resp, containing the appropriateness indices
Author(s)
Ivailo Partchev
References
Drasgow, F., Levine, M. V., & Williams, E. A. (1985).
Appropriateness measurement with polychotomous item
response models and standardized indices. British Journal
of Mathematical and Statistical Psychology, 38, 67–80
Examples
1
lebebr01/irtoys-2 documentation built on May 20, 2019, 11:29 p.m.
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Description Usage Arguments Value Author(s) References Examples
Description
Computes the Z3 appropriateness index, a measure of person fit in IRT models
Usage
1 | api(resp, ip, theta)
|
Arguments
resp |
A matrix of responses: persons as rows, items as columns, entries are either 0 or 1, no missing data |
ip |
Item parameters: a matrix with one row per item, and three columns: [,1] item discrimination a, [,2] item difficulty b, and [,3] asymptote c. |
theta |
A measure of ability, typically produced
with |
Value
A vector of length equal to the number of rows in
resp, containing the appropriateness indices
Author(s)
Ivailo Partchev
References
Drasgow, F., Levine, M. V., & Williams, E. A. (1985). Appropriateness measurement with polychotomous item response models and standardized indices. British Journal of Mathematical and Statistical Psychology, 38, 67–80
Examples
1 |
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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