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What is the purpose of sensory evaluation?
To provide valid and reliable information to R&D, production, and marketing.
What are the steps of sensory study?
- Determine the project objective, 2. Determine the test objective, 3. Screen samples, 4. Design test, 5. Conduct test, 6. Analyze data, 7. Interpret and report results.
What historical context influenced the development of sensory testing?
It was influenced by wartime efforts to provide acceptable food to American forces.
Which of the following is NOT a factor in sensory evaluation?
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Human subjects are reliable instruments in sensory evaluation.
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What should a good scale in sensory evaluation be based on?
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What is one of the objectives when determining the project objective in sensory evaluation?
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The brain interprets, organizes, and integrates incoming sensations into ______.
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Study Notes
History of Sensory Testing
- Systematic sensory analysis emerged in the 1950s, driven by wartime needs to ensure acceptable food for American forces.
- Organoleptic testing was used to describe supposedly objective sensory attribute measurements.
Sensory Evaluation Defined
- A set of techniques for accurately measuring human responses to food.
- Involves evoking, measuring, analyzing, and interpreting sensory responses.
- Provides reliable info for R&D, production, and marketing to support sound business decisions.
Factors in Sensory Evaluation
- Problem Definition: Precisely defining what needs measuring.
- Test Design: Minimizing testing for desired accuracy.
- Instrumentation: Selecting and training appropriate test subjects.
- Result Interpretation: Using statistical methods.
Human Subjects as Instruments
- Human sensory perception is highly variable over time and among individuals.
- Humans are prone to bias.
- Scales need careful study, based on physical and chemical factors.
- The sensory process involves stimulus conversion to nerve signals interpreted by the brain, leading to perception and response.
Seven Practical Tasks in Sensory Evaluation
- Project Objective: Defining the goal (e.g., product match, competitor improvement, cost reduction).
- Test Objective: Specifying what to measure (overall difference, attribute difference, preference, acceptability). Avoid too many questions in one test.
- Sample Screening: Sensory analysts examine all sensory properties of samples.
- Test Design: Selecting a technique, subjects, scoresheet, sample preparation, and presentation criteria.
- Test Conduct: Ensuring all design requirements are met.
- Data Analysis: Using expertise and statistical programs.
- Result Interpretation and Reporting: Reviewing results concerning project and test objectives, then making recommendations.
Applications of Sensory Evaluation
- Developing new products.
- Entering new markets.
- Enhancing competitiveness in existing markets.
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Description
This quiz explores the history and methods of sensory testing, which emerged in the 1950s to meet wartime food quality standards. It covers the definition, factors involved, and the role of human subjects in sensory evaluation, crucial for making informed business decisions in food science.
