J: Numerator of penalty used in WML.
In peterhalpin/BearShare: Psychometric models of small group collaborations
Description
Usage
Arguments
Value
Description
Computes equation 15 of Magis & Raiche (2012). For 2PL, this is also the derivative of the test info.
Usage
1
J(resp, parms, theta)
Arguments
resp
a matrix or data.frame containing the binary item responses with NA for missing responses (used omit missing responses).
parms
a named list or data.frame with elements parms$alpha and parms$beta corresponding to the discrimination and difficulty parameters of the 2PL model, respectively.
theta
the latent trait.
Value
length(theta) vector of derivatives of test information.
peterhalpin/BearShare documentation built on May 25, 2019, 12:48 a.m.
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Description Usage Arguments Value
Description
Computes equation 15 of Magis & Raiche (2012). For 2PL, this is also the derivative of the test info.
Usage
1 | J(resp, parms, theta)
|
Arguments
resp |
a matrix or data.frame containing the binary item responses with |
parms |
a named list or data.frame with elements |
theta |
the latent trait. |
Value
length(theta) vector of derivatives of test information.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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