plotINFO

An object of class <code>'eRm'</code>.

ermobject

A string denoting the type of information to be plotted. Currently supports <code>"item"</code>, <code>"test"</code> and <code>"both"</code> (default).

type

Supporting or sampling points on the latent trait.

theta

Defines the positioning of the legend, as in <code><a rd-options="eRm" href="/link/plotICC?package=eRm&version=1.0-2&to=eRm" data-mini-rdoc="eRm::plotICC">plotICC</a></code>.

legpos

Further arguments.
 <code>xlab</code> sets the label of the \(x\) axis.
 <code>ylabI</code> and <code>ylabT</code> control the labeling of the item or test information plot.
 <code>mainI</code> and <code>mainT</code> set the titles for item/test information plots.

Calculates and plots the individual or summed item information by Samejima (1969)

Fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM).  Missing values are allowed in the data matrix.  Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, Martin-Loef-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, ICC and other plots, automated stepwise item elimination, simulation module for various binary data matrices.

Patrick Mair

Extended Rasch Modeling

Reinhold Hatzinger

Thomas Rusch

Rudolf Debelak

plotINFO function

<dl> <dt>ermobject</dt>
<dd>An object of class <code>'eRm'</code>.</dd> <dt>type</dt>
<dd>A string denoting the type of information to be plotted. Currently supports <code>"item"</code>, <code>"test"</code> and <code>"both"</code> (default).</dd> <dt>theta</dt>
<dd>Supporting or sampling points on the latent trait.</dd> <dt>legpos</dt>
<dd>Defines the positioning of the legend, as in <code>plotICC</code>.</dd> <dt>...</dt>
<dd>
 Further arguments.
 <code>xlab</code> sets the label of the \(x\) axis.
 <code>ylabI</code> and <code>ylabT</code> control the labeling of the item or test information plot.
 <code>mainI</code> and <code>mainT</code> set the titles for item/test information plots.</dd></dl>

Arguments

Author

Plot Information For 'eRm' objects — plotINFO

<dl>

 <dt>ermobject</dt>
<dd>An object of class <code>'eRm'</code>.</dd>

 <dt>type</dt>
<dd>A string denoting the type of information to be plotted. Currently supports <code>"item"</code>, <code>"test"</code> and <code>"both"</code> (default).</dd>

 <dt>theta</dt>
<dd>Supporting or sampling points on the latent trait.</dd>

 <dt>legpos</dt>
<dd>Defines the positioning of the legend, as in <code>plotICC</code>.</dd>

 <dt>...</dt>
<dd>
 Further arguments.
 <code>xlab</code> sets the label of the \(x\) axis.
 <code>ylabI</code> and <code>ylabT</code> control the labeling of the item or test information plot.
 <code>mainI</code> and <code>mainT</code> set the titles for item/test information plots.</dd>

</dl>

plotINFO: Plot Information For `'eRm'` objects

Description

Usage

Arguments

Author

References

See Also

Examples