getb

Function to calculate the b-measure, which quantifies the sensory 
differentiation retained.

Package contains functions for analyzing check-all-that-apply (CATA) data from consumer and sensory tests. Cochran's Q test, McNemar's test, and Penalty-Lift analysis are provided; for details, see Meyners, Castura & Carr (2013) <doi:10.1016/j.foodqual.2013.06.010>. Cluster analysis can be performed using b-cluster analysis, then evaluated using various measures; for details, see Castura, Meyners, Varela & Næs (2022) <doi:10.1016/j.foodqual.2022.104564>. Methods are adapted to cluster consumers based on their product-related hedonic responses; for details, see Castura, Meyners, Pohjanheimo, Varela & Næs (2023) <doi:10.1111/joss.12860>. Permutation tests based on the L1-norm methods are provided; for details, see Chaya, Castura & Greenacre (2025) <doi:10.48550/arXiv.2502.15945>.

J C Castura

cata

Analysis of Check-All-that-Apply (CATA) Data

J.C. Castura

getb function

<dl><dt>X.b</dt>
<dd>three-way (\(I \times J(J-1)/2 \times M\)) array with 
\(I\) assessors, \(J(J-1)/2\) product comparisons, \(M\) CATA 
attributes, where values are counts of types <code>b</code> and <code>c</code> from the function 
<code>barray</code>)</dd>
<dt>X.c</dt>
<dd>array of same dimension as <code>X.b</code>, where values are counts of 
types <code>b</code> and <code>c</code> from the function <code>barray</code>)</dd>
<dt>oneI</dt>
<dd>indicates whether calculation is for one assessor (default: 
<code>FALSE</code>)</dd>
<dt>oneM</dt>
<dd>indicates whether calculation is for one attribute (default: 
<code>FALSE</code>)</dd></dl>

Arguments

Author

Calculate the b-measure — getb

<dl>

<dt>X.b</dt>
<dd>three-way (\(I \times J(J-1)/2 \times M\)) array with 
\(I\) assessors, \(J(J-1)/2\) product comparisons, \(M\) CATA 
attributes, where values are counts of types <code>b</code> and <code>c</code> from the function 
<code>barray</code>)</dd>


<dt>X.c</dt>
<dd>array of same dimension as <code>X.b</code>, where values are counts of 
types <code>b</code> and <code>c</code> from the function <code>barray</code>)</dd>


<dt>oneI</dt>
<dd>indicates whether calculation is for one assessor (default: 
<code>FALSE</code>)</dd>


<dt>oneM</dt>
<dd>indicates whether calculation is for one attribute (default: 
<code>FALSE</code>)</dd>

</dl>

getb: Calculate the b-measure

Description

Usage

Value

Arguments

Author

References

Examples