In this section:
Sensory difference testing tips
Briony Liebich
Sensory Technologist
South Australian Research & Development Institute
Waite Research Precinct, SA 5064
briony.liebich@sa.gov.au
Figures, tables and photos to assist with conducting difference testing.
For more details, refer to Briony’s article ‘Sensory testing at work in a winery’ published in Australia and New Zealand Grapegrower & Winemaker, December 2010.
Example test sheet for duo-trio test. Note sample codes do not need to be printed when using paper test sheets, as the order of samples will be different for each assessor and they should be trained to write their codes as presented to them from left to right.
Date: ........ Name: .........
Duo-Trio Diffence Test
Aroma & Taste
In this set, the left-hand sample is a reference sample (R); one of the other two coded samples is the same as the reference.
Please assess samples by smell and taste, and then circle the number of the sample that is the SAME as the reference (R).
Once you have picked the samples, please comment on the reasons for your response.
You may re-taste as often as you require.
Please pause and rinse your palate with water between each sample.
You must make a choice.
| Circle the SAME as left-hand sample | How sure are you? (Please tick) |
Please comment on the sample you didn't choose |
|
— — — — — — — — — R |
◊ Guess ◊ Unsure ◊ Quite sure ◊ Very sure |
A presentation design or serving order for a duo-trio test in balanced reference mode.
| Asessor | Set 1 | Set 2 |
|---|---|---|
| 1 | RA A B | RB B A |
| 2 | RB B A | RA B A |
| 3 | RA B A | RA B A |
| 4 | RB B A | RA A B |
| 5 | RB B A | RB A B |
| 6 | RB A B | RB B A |
| 7 | RA A B | RA B A |
| 8 | RA A B | RB A B |
| 9 | RA A B | RA A B |
| 10 | RA B A | RB B A |
Example presentation for two duo-trio tests from a red wine trial. Large cardboard cups make useful spittoons. Paper scorecheet left blank for assessors to write sample codes as presented to them, in order from left to right. Generally Test 1 appears in the front row, followed by Test 2 in the back row.
Two assessors using a portable booth which was made specially from lightweith plastic material (corflute).
Example test sheet for paired comparison method. The test sheet could be printed in two formats with each sample code appearing in the first position as there are two serving orders for this test i.e. Wine A then Wine B, Wine B then Wine A.
Date: ........ Name: .........
Paired Comparison
Taste only
There is a pair of samples presented. Please assess samples as presented to you from left to right and circle the code of the sampel which best answers each questions.
You must make a choice.
Please TASTE the samples and answer the following:
Which samples has more ....?
|
Sample Codes (please circle) |
Comments | ||
| Acidity | 820 | 416 | |
| Ripe fruit flavour | 820 | 416 | |
| Body | 820 | 416 | |
| Fruit persistence | 820 | 416 | |
