Sensory Evaluation and Consumer Acceptability
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What is the science of sensory evaluation?
A behavioural science designed to evoke, measure, analyze, interpret, and quantify reactions to those characteristics of foods and materials as they are perceived by the senses of sight, smell, taste, touch, and hearing.
What are the sense?
Sight, odour, touch, taste, sound
What is the inability to smell called?
anosmic
What are 3 steps in sensing taste?
• Taste buds detect initially • olfactory epithelium (sense aroma) • Retro-inhalation after chewing
What are the 5 basic tastes?
• Salty • Sour • Sweet • Bitter • Umami (savoury)
Are taste buds location specific?
NO
Why does food taste different if you cant smell it?
Because aromas and odourants are volatile compounds that contribute to the experience of taste.
What factors contribute to flavour? (4)
• Taste • Odour • Mouth feel (texture) • Trigeminal perception
What nerves are involved in taste? (3)
• Facial • Glossopharyngeal • Trigeminal
What do facial nerves detect?
stuff at front of tongue
What does glossopharyngeal nerve detect?
Oral sensations, taste at back of mouth, and salivation
What does the trigeminal detect?
Thermal, Chemical, and pain
What are supertasters?
People with more fungioform papillae and are sensitive to the chemical PROP
How can you spot a supertaster?
They have strong food dislikes and can detect ingredients in food. Their reactions to different chemicals are more intense.
What has been shown in studies about the health of super tasters?
That they are thinner with less risk for CVD but an increased risk for colon cancer.
What age group are considered to be supertasters?
Children
What are medium tasters?
People who tend to like most food, fuss about preparation, and think positively about food
What are nontasters?
Prefere higher sweetness levels but theink of food in terms of its presentation and healthfulness.
What age group are considered nontasters?
seniors
What type of tests evaluate food?
Subjective and objective
What are affective/ hedonic tests?
Done by untrained panelists such as a consumer panelist to measure degree of liking for food and properties. Measured on a 9 point scale.
What is the pepsi challenge?
A paired preference test
What are analytical tests?
Tests with trained or untrained a panelists evaluating attributes and acting as an instrument.
What are 2 types of descriptive test methods?
Quantify intensities of sensory characteristics is measured and a flavour or texture profile analysis is determined by highly trained tasters.