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MODELING DIFFERENCES BETWEEN PANELISTS IN USE OF MEASUREMENT SCALES
Author(s) -
WILKINSON CLARE,
YUKSEL DOGAN
Publication year - 1997
Publication title -
journal of sensory studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 53
eISSN - 1745-459X
pISSN - 0887-8250
DOI - 10.1111/j.1745-459x.1997.tb00053.x
Subject(s) - dispersion (optics) , scale (ratio) , range (aeronautics) , nonlinear system , statistics , computer science , data mining , mathematics , econometrics , engineering , geography , physics , optics , cartography , quantum mechanics , aerospace engineering
In sensory data sets, an important source of differences between panelists is in their use of the measurement scale. These differences can be summarized in differences in location , the overall level, and differences in dispersion , the range of the scale used. This paper discusses a method of correcting for these differences by jointly modeling location and dispersion using a see‐saw algorithm. This approach is also applicable when scores are not normally distributed and when there is a (nonlinear) relationship between the dispersion and the location. The approach is illustrated with an example for flavor data of freeze‐dried and hot‐air dried peppers.