Magnitude estimation panel training

Many studies have attempted to compare the results of magnitude estimation versus some of the more standard scaling techniques or semi-structure or unstructured line techniques and different results have arisen from these various studies (5-8). Based on my experience, the more important consideration is the degree of training of the panel utilized in trained panel work rather than the type of scale that is used. However, magnitude estimation results do tend to show more differences when the differences are very small than do other methods. 

The assessment of decipol levels using trained panels of the air in office buildings (European Audit project [27]) is an example of magnitude estimation with memory references. The same method, but instead having the references (with munerical values) nearby to compare, is an example of magnitude estimation with several references. This method was applied in several European projects (European Audit project [27], Database project [28], MATHIS [29], AIRLESS [30]) and is presented in Sect. 3.2. 

This paper addresses the quantitative measurement of odor properties using naive panels and presents methods for their selection and training. In particular, we will show how naive panelists are trained to use a magnitude estimation scale along with some typical results generated by a panel of this type. 

Fourteen members of an experienced paid panel were used in the trial (aged from 32 to 61 years 11 females and 3 males), and each appraised all of the six test solutions. The panel had been trained in the techniques of magnitude estimation and time-intensity analysis and had demonstrated ability in these techniques over a period of several years. A familiarization session was held before the trial, to ensure that the panel were comfortable with appraising samples delivered in-mouth by McFlads. 

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