Le nombre de sujets dans les panels d'analyse sensorielle : une approche base de données

The costs associated with sensory evaluation increase with the number of panelists to be enrolled. Classical power computation can be used to derive the minimal number of subjects of a sensory panel in order to control both type I (α risk) and type II (β risk) errors. However, this power computation requires estimates of the size of the product effect to be sought and of the residual variability of the ANOVA model used. Generally, both product effect size and residual variability are difficult to estimate a priori by the sensory analyst. This work offers estimations of these two parameters thanks to the analysis of hundreds descriptive andhedonic studies collected respectively in two databa…

Le nombre de sujets dans les panels d'analyse sensorielle : une approche base de données

The costs associated with sensory evaluation increase with the number of panelists to be enrolled. Classical power computation can be used to derive the minimal number of subjects of a sensory panel in order to control both type I (α risk) and type II (β risk) errors. However, this power computation requires estimates of the size of the product effect to be sought and of the residual variability of the ANOVA model used. Generally, both product effect size and residual variability are difficult to estimate a priori by the sensory analyst. This work offers estimations of these two parameters thanks to the analysis of hundreds descriptive andhedonic studies collected respectively in two databa…

Panels de consommateurs : quel effectif interroger ?

Dossier technique ; Enils = Ecoles Nationales de l'Industrie Laitière; National audience

Choosing the right panel size for a descriptive or for an hedonic sensory study based on knowledge gained from two sensory databases

Choosing the right panel size for a descriptive or for an hedonic sensory study based on knowledge gained from two sensory databases. 5. european conference on Sensory consumer science of foods and beverages. A sense of inspiration

Adequate number of consumers in a liking test. Insights from resampling in seven studies

The recommended number of consumers to be enrolled in a hedonic test comparing several products usually ranges from 50 to 100, at least if no liking segmentation is sought. This paper seeks to examine whether such a panel size range is adequate, by means of 7 trials with different levels of product space complexity. Five types of products were tested: Two varied in fattiness and sweetness and were tested under the same conditions in two separate laboratories (4 trials); the remaining three, varying in taste and texture, were each tested in a different laboratory (3 trials). Each of the 7 trials was run by a different laboratory. Each of the seven laboratories enrolled in its trial 150 consu…

The right number of consumers to be enrolled in a liking test strongly depends on the level of sensory complexity among products

Number of assessors in descriptive sensory panels. A database approach

International audience

Do we need replications in sensory profiling?