Sensory Evaluation Flashcards
(19 cards)
What are the 3 types of panelists?
- consumer,
- semi-trained,
- trained
T/F: Product presentation can vary a bit
FALSE, must be consistent
How should be the order of presentation?
Random or counterbalanced between panelists
Sensory evaluation:
Scientific discipline used to evoke, measure, analyze and interpret reactions to products percieved by sight, smell, touch, taste and hearing
T/F Humans detect at lower levels than equipment
TRUE
5 principles to a controlled environment:
- Individual booths
- Neutral odor
- Controlled light
- Good ventilation
- Washbasin
3 key points to good test regarding panelists:
- Promote detection
- Focus
- Motivation
2 Sensorial approaches:
- Analytical method (objective)
2. Affective method (subjective)
Describe Analytical method (objective)
- Product oriented
- Fewer people, selected, trained
- Discriminative
Describe Affective method (subjective)
- people oriented
- More people (>60), naive
- Consumer liking (hedonic)
When to use a discriminative test (analytical method)? (3)
- find difference between 2 products
- Show a similitude between 2 products
- Test the ability of panelists
“Which product is sweeter?”
Paired comparison
“Which is the same as reference?”
Duo-trio
“Which one is different?”
Triangle
“Which are the same as the reference?”
A - not A
“What are the 2 identical products? (out of 4)”
Tetrad
“Which product is represented twice?(out of 5)”
2 out of 5
When to make a test?
When products differences are small, any cues, conscious or subconscious, will influence the decision
How to limit experimental bias? (4)
- Avoid giving too much information
- No discussion between panelists
- Good presentation of sample
- Controlled environnement
