Product spaces derived from projective mapping and CATA questions: Influence of replicated assessments and increased number of study participants

Leticia Vidal; Sara R. Jaeger; Lucía Antúnez; Ana Giménez; Gastón Ares

doi:10.1111/joss.12220

journal article Jul 11, 2016

Product spaces derived from projective mapping and CATA questions: Influence of replicated assessments and increased number of study participants

Leticia Vidal

Sara R. Jaeger

Lucía Antúnez Ana Giménez Gastón Ares

Journal of Sensory Studies Vol. 31 No. 5 pp. 373-381 · Wiley

View at Publisher Save 10.1111/joss.12220

Abstract

AbstractMethodological research is needed to support the continued popularity of sensory product characterization by consumers. The present research considers stability and reliability of such product spaces. Using data from 13 studies (n = 1332) involving check‐all‐that‐apply questions (CATA) and projective mapping tasks replicated assessments and increasing the sample size are evaluated for their impact on the product spaces derived from a base group of consumers. In each study, a group of consumers (41–95 participants) completed a sensory characterization task twice under identical conditions (“replication” condition), and additional consumers (49–93 participants) completed the task (“increased sample size” condition). The stability of product spaces was evaluated using a bootstrapping resampling approach. Both experimental conditions had a small but positive impact as evidenced by small increases in average RV coefficients across simulations. Additionally, in studies using projective mapping, the confidence ellipses around sample positions were smaller than those established in product spaces with the base group of consumers. This pointed to increased sample discrimination.Practical applicationsThis research reveals that replication and increased sample size by inclusion of additional consumers can be used to increase stability of product spaces from sensory characterization based on projective mapping and CATA questions. Stability in product spaces underpins reliability of the research, and by extension internal validity.

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Details

Published: Jul 11, 2016
Vol/Issue: 31(5)
Pages: 373-381
License: View

Authors

L

Leticia Vidal

Sensometrics & Consumer Science, Instituto Polo Tecnológico de Pando, Facultad de Química Universidad de la República Canelones Uruguay

S

Sara R. Jaeger

The New Zealand Institute for Plant & Food Research Ltd Auckland New Zealand

L

Lucía Antúnez

Sensometrics & Consumer Science, Instituto Polo Tecnológico de Pando, Facultad de Química Universidad de la República Canelones Uruguay

A

Ana Giménez

Sensometrics & Consumer Science, Instituto Polo Tecnológico de Pando, Facultad de Química Universidad de la República Canelones Uruguay

G

Gastón Ares

Sensometrics & Consumer Science, Instituto Polo Tecnológico de Pando, Facultad de Química Universidad de la República Canelones Uruguay

Funding

Comisión Sectorial de Investigación Científica

The New Zealand Ministry for Business, Innovation & Employment

The New Zealand Institute for Plant & Food Research Ltd.

Cite This Article

Leticia Vidal, Sara R. Jaeger, Lucía Antúnez, et al. (2016). Product spaces derived from projective mapping and CATA questions: Influence of replicated assessments and increased number of study participants. Journal of Sensory Studies, 31(5), 373-381. https://doi.org/10.1111/joss.12220

Product spaces derived from projective mapping and CATA questions: Influence of replicated assessments and increased number of study participants

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