logLik.pers

S3 logLik method to extract the log-likelihood for object of class<code>"pers"</code>

methods

Performs the explicit calculation
-- not estimation! -- of the Rasch item parameters for dichotomous and
polytomous item responses, using a pairwise comparison approach. Person
parameters (WLE) are calculated according to Warm's weighted likelihood
approach.

Joerg-Henrik Heine

pairwise

Rasch Model Parameters by Pairwise Algorithm

logLik.pers function

<dl><dt>object</dt>
<dd>object of class<code>"pers"</code></dd>
<dt>sat</dt>
<dd>a "logical" with default set to <code>sat=FALSE</code> to return the Log-Likelihood of the data for the unrestricted modell based on parameters estimated with function <code>pers</code>. If set to <code>sat=TRUE</code> the Log-Likelihood of the saturated model is returned instead.</dd>
<dt>p</dt>
<dd>a "logical" with default set to <code>p=FALSE</code> to return the category propabilities for the empirical data.</dd>
<dt>...</dt>
<dd>not used jet.</dd></dl>

Arguments

S3 logLik for Object of class "pers" — logLik.pers

<dl>

<dt>object</dt>
<dd>object of class<code>"pers"</code></dd>


<dt>sat</dt>
<dd>a "logical" with default set to <code>sat=FALSE</code> to return the Log-Likelihood of the data for the unrestricted modell based on parameters estimated with function <code>pers</code>. If set to <code>sat=TRUE</code> the Log-Likelihood of the saturated model is returned instead.</dd>


<dt>p</dt>
<dd>a "logical" with default set to <code>p=FALSE</code> to return the category propabilities for the empirical data.</dd>


<dt>...</dt>
<dd>not used jet.</dd>

</dl>

logLik.pers: S3 logLik for Object of class "pers"

Description

Usage

Arguments