Investigation of the number of consumers necessary to obtain stable sample and descriptor configurations from check-all-that-apply (CATA) questions

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Título

Investigation of the number of consumers necessary to obtain stable sample and descriptor configurations from check-all-that-apply (CATA) questions

Tema

CONSUMIDORES
EVALUACION SENSORIAL
METODOLOGIA DE LA INVESTIGACION
BIBLIOGRAFIA NACIONAL QUIMICA
2014

Abstract

As the use of check-all-that-apply (CATA) questions for consumers to aid sensory product characterization
gains popularity the need for developing guidelines regarding best practice increases. An important
issue in the design of studies including CATA questions is the number of consumers that are necessary to
obtain stable results. In this context, the aim of the present work was to study the stability of sample and
descriptor configurations obtained using CATA questions with consumers, by means of a bootstrapping
resampling approach. Data from 13 consumer studies were analyzed, differing in number of consumers,
product category, number of samples, degree of difference among samples and number and type of
descriptors in the CATA question. For each study, 1000 random subsets of different number of consumers
were generated from the original data set. For each consumer virtual panel, sample and descriptor configurations
were obtained using Correspondence Analysis and the concordance between them and the
reference configurations (obtained with all the consumers) were computed using the regression vector
(RV) coefficient. The RV coefficients of sample and descriptor configurations increased with the number
of consumers, suggesting an increase in the stability of the configurations. Results showed that the number
of consumers necessary to yield fully stable configurations depended on the degree of difference
among samples, the complexity of the sensory space and the type of descriptors included in the CATA
question. Across the 13 data sets analysed, results suggested that when working with widely different
samples, 60–80 consumers can be regarded as a reasonable compromise to get stable sample and descriptor
configurations. However, it is recommended to check, a posteriori, the stability of sample and descriptor
configurations using a stability index based on bootstrapping.

Autor

Tárrega, Amparo
Izquierdo, Luis
Jaeger, Sara R.

Fuente

Food Quality and Preference v. 35, 2014. -- p. 135-141

Editor

Elsevier

Fecha

2014

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PDF

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Inglés

Tipo

Artículo

Identificador

http://dx.doi.org/10.1016/j.foodqual.2013.08.012

Document Item Type Metadata

Original Format

PDF
Fecha de agregación
November 26, 2014
Colección
Bibliografía Nacional Química
Tipo de Elemento
Document
Etiquetas
, ,
Citación
Ares, Gastón, “Investigation of the number of consumers necessary to obtain stable sample and descriptor configurations from check-all-that-apply (CATA) questions,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed September 28, 2020, http://riquim.fq.edu.uy/items/show/2078.
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