Lfun

a.cur

bkmat

Fr.cent

Number for rating scale categories so that the rating scale is <code>1:q</code>.

const

Calculate the loss function for constrained dual scaling.

multivariate

This is an implementation of constrained dual scaling for
detecting response styles in categorical data, including utility functions. The
procedure involves adding additional columns to the data matrix representing the
boundaries between the rating categories. The resulting matrix is then doubled
and analyzed by dual scaling. One-dimensional solutions are sought which provide
optimal scores for the rating categories. These optimal scores are constrained
to follow monotone quadratic splines. Clusters are introduced within which the
response styles can vary. The type of response style present in a cluster can
be diagnosed from the optimal scores for said cluster, and this can be used to
construct an imputed version of the data set which adjusts for response styles.

Pieter Schoonees

Constrained Dual Scaling for Detecting Response Styles

Lfun function

<dl><dt>a.cur</dt>
<dd>The current value for a.</dd>
<dt>bkmat</dt>
<dd>Current value of bkmat.</dd>
<dt>G</dt>
<dd>Current value G.</dd>
<dt>Fr.cent</dt>
<dd>Current value of the centred Fr.</dd>
<dt>n</dt>
<dd>Number of respondents.</dd>
<dt>m</dt>
<dd>Number of items.</dd>
<dt>q</dt>
<dd>Number for rating scale categories so that the rating scale is <code>1:q</code>.</dd>
<dt>const</dt>
<dd>Constant part of the loss function</dd>
<dt>K</dt>
<dd>Number of response style groups.</dd></dl>

Arguments

Calculate Constrained Dual Scaling Loss — Lfun

<dl>

<dt>a.cur</dt>
<dd>The current value for a.</dd>


<dt>bkmat</dt>
<dd>Current value of bkmat.</dd>


<dt>G</dt>
<dd>Current value G.</dd>


<dt>Fr.cent</dt>
<dd>Current value of the centred Fr.</dd>


<dt>n</dt>
<dd>Number of respondents.</dd>


<dt>m</dt>
<dd>Number of items.</dd>


<dt>q</dt>
<dd>Number for rating scale categories so that the rating scale is <code>1:q</code>.</dd>


<dt>const</dt>
<dd>Constant part of the loss function</dd>


<dt>K</dt>
<dd>Number of response style groups.</dd>

</dl>

Lfun: Calculate Constrained Dual Scaling Loss

Description

Usage

Arguments