Intro to Sensory Science Flashcards
(23 cards)
Define “Sensory Science”
Scientific discipline used to:
1. evoke
2. measure
3. analyze
4. interperet
reactions to those characteristics of food materials as they are percieved by the senses of smell, sight, touch, taste and hearing
Define “Sensory Evaluation”
A multi-disciplinary science that** uses humans** to measure acceptability and **sensory properties **of food and other material
Who uses sensory science?
- Food and beverage companies
- Pharmacutical companies
- Personal care/cosmetics
- Pet food
How is sensory science used in the industry?
- Quality control
- Consumer acceptability/market testing
- Product development/reformulation
- Establish standards
- Off-aroma analysis
- Determine end-product quality
- Sotrage and shelf life studies
- Product matching/competator comparison
SE history
What was the role of “Expert tasters” in the history of sensory science
- Introduced the use of numerical values (score card) - Hinreicher (1956)
SE history
How was sensory science used in the 1940’s and 50’s
as a wartime effort to provide acceptable food
SE history
Which method was used in 1957
Flavour profile method
SE history
What role did UC Davis play in the history of sensory science?
They offered sensory evaluation courses in the mid-1950’s
SE history
Which significant programs took place in the 1960’s and 70’s?
- “War on Hunger”
- “Food from sea”
SE history
Which factors influenced the development of sensory evaluation
- Expert tasters
- Food fabrication
- cost of raw materials
- competition
- internationalization of the marketplace
SE History
Which factors led to the further development of SE in the modern day?
- Increase in technology
- Changed in consumer attitude
- Reliance on experts was questioned
Considerations of human subjects
What are three challenges sensory scientists face considering human subjects? How do you overcome them?
- Variable over time - repitition
- **Variable amongst themselves **- adequate number of subjects
- **Prone to bias **- understand factors which influence panel attitudes
What are the four types of sensory analysis panelists? How many of each specific catergory are typically used in an evaluation?
- Highly trained experts (2-3 people)
- Trained laboratory panels (10-20 people)
- Laboratory acceptance panels (25-50 people)
- Large consumer panels (>100 people)
Sensory evaluation tests
What os the purpose of a product oriented test?
Focuses on the product itself: measures the presence and/or intensity of specific attribute in the product
Sensory evaluation tests
What is the purpose of consumer-oriented tests
Focuses on how the consumer feels about the product:
1. Determine consumer acceptability
2. Measures opinions about an “emotional” rection to a product (ie preference or acceptability)
Why is there hesitation/resistance towards sensory evaluation?
- Expensive
- personnel dependent
- Requires time (panelists to sacrifice their own time) - need compensation
- Subjectivity if not under controlled conditions
What do subjective test methods measure? What are they trying to evaluate?
- measures opinion or emotions about a product
- evaluate the subject
What do objective test methods measure? What are they trying to evaluate?
- Measures the presence/absence of specific attributes
- evaluate the product
What kind of instrumental analysis techniques can you use?
- Colour changes - Hunter lab
- Aroma differences - volatile analysis using GC/MS
- Texture differences - Texture profile analysis
What are the benifits and challenges of instrumental measures?
What are the benifits and challenges of sensory measures?
Can analysis replace sensory?
