6533b7dafe1ef96bd126f667
RESEARCH PRODUCT
Multiplicative decomposition of the scaling effect in the Mixed Assessor Model into a descriptor-specific and an overall coefficients
Pascal SchlichPascal SchlichPascal SchlichMichel VisalliMichel VisalliMichel VisalliCaroline PeltierCaroline PeltierCaroline Peltiersubject
0301 basic medicine030109 nutrition & dieteticsNutrition and Dietetics[ SDV.AEN ] Life Sciences [q-bio]/Food and Nutritionscaling04 agricultural and veterinary sciencesmixed assessor modelDecomposition analysis040401 food sciencemeta-analysis03 medical and health sciences0404 agricultural biotechnologyStimulus modalityScaling effectStatisticssensometricsScalingsensobase[SDV.AEN]Life Sciences [q-bio]/Food and NutritionFood ScienceMathematicsdescription
Abstract In 1994, Brockhoff and Skovgaard presented the so-called assessor model, including a “scaling coefficient” expressing the predisposition of a panelist to spread more or less his scores than the panel on a given sensory descriptor. This paper discusses potential scaling causes, and then proposes a decomposition of the scaling coefficient into two components: (i) an overall scaling coefficient, independent of the descriptors, expressing a psychological trend of the panelist towards the scoring task in general; (ii) a corrected scaling coefficient for each descriptor, expressing specific sensitivity of the panelist to the descriptor. Applied to 187 sensory datasets, this decomposition showed that panelists over sixty years old and smokers tend to spread less their scores than other panelists regardless of the sensory modalities; further, the corrected scaling coefficients were more heterogeneous among panelists for aroma and flavor compared to texture and appearance sensory modalities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-03-01 |