Essay about Sensory Evaluation Method

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discrimination/Difference Test



Consumer inclination tests

Difference tests



Discrimination/Difference tests

Difference tests would be the simplest and the most sensitive sort of product tests They are used to determine:

whether a difference in a few specific characteristic exists among two examples if 1 sample can be preffered to a new

Hoewer, cannost be used to ascertain how large is the difference or desire between examples

Application of Big difference tests

Program quality control

Monitoring the consequence of change in production (e. g. effect of component substitution, method modifications, changes in raw materials suppliers) These kinds of tests in many cases are used as the first step in a much more complex sensory evaluation process, with a big difference between selections indicating the need for further testing

Commonly Used Difference Tests

Combined comparison

two samples as opposed, one to end up being selected (1-tailed)

where inclination is asked both sample may be correct (2-tailed) Triangle evaluation

only one response can be correct

Difference to refference/control


multiple evaluation

Example of a Paired Comparison Test

A paired assessment test was run to assess the effect of storage on the flavour of soup powder. A control sample (A) was compared with an example which have been subjected to long-term storage (B). After reconstitution, the examples were coded with 3 digit randomly numbers and presented to a panel of twelve. Six of the panelists were advised to taste B 1st. The panelists were asked " Are you able to detect an improvement in taste between two samples? ” Nine of twelve panelists answered " YES” to this question. Did storage possess a significant impact on the taste of the soups powder?

Using a one-tailed binominal table, the minimum volume of correct responses needed to set up a significant difference in the 5% probablility level (i. e. p

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