rangeCheck

Regression model only work in a specific range and extrapolation horizontally (outside
the original range) or vertically (extreme norm scores) might lead to inconsistent
results. The function generates a message, indicating extrapolation and the range of the original data.

A comprehensive toolkit for generating continuous test norms in
psychometrics and biometrics, and analyzing model fit. The package offers both
distribution-free modeling using Taylor polynomials and parametric modeling
using the beta-binomial distribution. Originally developed for achievement
tests, it is applicable to a wide range of mental, physical, or other test
scores dependent on continuous or discrete explanatory variables. The package
provides several advantages: It minimizes deviations from representativeness
in subsamples, interpolates between discrete levels of explanatory variables,
and significantly reduces the required sample size compared to conventional
norming per age group. cNORM enables graphical and analytical evaluation of
model fit, accommodates a wide range of scales including those with negative
and descending values, and even supports conventional norming. It generates
norm tables including confidence intervals. It also includes methods for
addressing representativeness issues through Iterative Proportional Fitting.

Wolfgang Lenhard

cNORM

Continuous Norming

Alexandra Lenhard

Sebastian Gary

WPS publisher 

rangeCheck function

<dl><dt>object</dt>
<dd>The regression model or a cnorm object</dd>
<dt>minAge</dt>
<dd>The lower age bound</dd>
<dt>maxAge</dt>
<dd>The upper age bound</dd>
<dt>minNorm</dt>
<dd>The lower norm value bound</dd>
<dt>maxNorm</dt>
<dd>The upper norm value bound</dd>
<dt>digits</dt>
<dd>The precision for rounding the norm and age data</dd>
<dt>...</dt>
<dd>additional parameters</dd></dl>

Arguments

Check for horizontal and vertical extrapolation — rangeCheck

<dl>

<dt>object</dt>
<dd>The regression model or a cnorm object</dd>


<dt>minAge</dt>
<dd>The lower age bound</dd>


<dt>maxAge</dt>
<dd>The upper age bound</dd>


<dt>minNorm</dt>
<dd>The lower norm value bound</dd>


<dt>maxNorm</dt>
<dd>The upper norm value bound</dd>


<dt>digits</dt>
<dd>The precision for rounding the norm and age data</dd>


<dt>...</dt>
<dd>additional parameters</dd>

</dl>

rangeCheck: Check for horizontal and vertical extrapolation

Description

Usage

Value

Arguments

See Also

Examples