probability.3pl: 3PL probability function The probability function in the 3PL...
In SICSresearch/IRTpp_old: Estimating IRT parameters using the IRT Methodology
Description
3PL probability function
The probability function in the 3PL model.
Usage
1
2
probability.3pl(z = NULL, a = z$a, b = z$b, c = NULL, d = z$d,
cp = z$cp, theta)
Arguments
z
Optional. A list with the parameters a b and c specified by keys.
a
The discrimination parameter
b
The difficulty parameter. (Optional if d is specified)
c
The guessing parameter
d
Optional. Overrides the b parameter, it is equal to -a*b. Used in some functions.
cp
Optional. Overrides the c parameter, it is logit(c)
theta
The subject's latent trait.
SICSresearch/IRTpp_old documentation built on May 9, 2019, 11:12 a.m.
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Description
3PL probability function The probability function in the 3PL model.
Usage
1 2 | probability.3pl(z = NULL, a = z$a, b = z$b, c = NULL, d = z$d,
cp = z$cp, theta)
|
Arguments
z |
Optional. A list with the parameters a b and c specified by keys. |
a |
The discrimination parameter |
b |
The difficulty parameter. (Optional if d is specified) |
c |
The guessing parameter |
d |
Optional. Overrides the b parameter, it is equal to -a*b. Used in some functions. |
cp |
Optional. Overrides the c parameter, it is logit(c) |
theta |
The subject's latent trait. |
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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