24 Questions
What is the primary function of a trained panel in descriptive analysis?
To detect and describe the sensory attributes of a product
What is the purpose of panelist training in descriptive analysis?
To teach panelists how to describe the sensory attributes of a product
In descriptive analysis, what is the purpose of rating the quantitative aspects of a sample?
To quantify the intensity of each sensory attribute
What is the purpose of using a 15 cm line scale in descriptive analysis?
To quantify the intensity of each sensory attribute
What is the primary advantage of using a larger panel size in descriptive analysis?
To increase the accuracy of the results
What is the term for the combination of the qualitative and quantitative sensory aspects of a product that define it and differentiate it from others?
Product characterization
What is the term for the process of evaluating the intensity of each sensory attribute over time?
Time-intensity analysis
What is the statistical method used in descriptive analysis to analyze the data collected from a sensory panel?
ANOVA
What is the primary use of descriptive analysis data?
To document the sensory properties of products
Which type of analysis is commonly used in projective mapping?
Multiple factor analysis
What is the advantage of using trained panelists in projective mapping?
They can help improve product differentiation
What is the primary goal of descriptive analysis?
To identify the sensory properties of products
What is the purpose of sorting techniques in descriptive analysis?
To group products based on their attributes
Which analysis technique is used in sorting methods?
Frequency analysis
What is the role of descriptive analysis in product development?
To provide guidelines for product formulation
Who can participate in projective mapping?
Both trained panelists and naïve consumers
What is the primary goal of the QDA method in selecting panelists?
To select panelists based on their ability to discriminate differences in sensory properties
What is the role of the panel leader in QDA method?
To facilitate the generation of terminology without influencing the group
How do panelists evaluate products in the QDA method?
One at a time, in separate booths
What is the purpose of using product and ingredient references in QDA method?
To stimulate the generation of terminology among panelists
How do panelists enter their data in the QDA method?
Using a card reader directly from the score sheets
What is the primary focus of the QDA method in statistical analysis?
Determining the appropriate terms and procedures for analysis
What is the purpose of using a 15 cm (6 in.) line scale in the QDA method?
To allow panelists to develop their own approach to scoring
What is the primary benefit of using the QDA method in descriptive analysis?
It relies heavily on statistical analysis to determine the appropriate terms and procedures
Study Notes
Descriptive Analysis Techniques
- Descriptive analysis involves the detection and description of both qualitative and quantitative sensory aspects of a product by trained panels of 5-100 judges.
Projective Mapping (Napping)
- Projective mapping is a process where panelists group samples on a 2D plane according to their similarity.
- Attributes that describe products can be added to the plane.
- Trained or expert panelists can improve product differentiation.
- Data analysis can be done with multiple factor analysis or general procrustes analysis.
Sorting
- Sorting techniques involve grouping samples in a way that makes sense to individual panelists.
- Panelists can regroup products as many times as necessary until all possible groupings have been made.
- Data analysis can be done with frequency analysis.
Application of Descriptive Analysis Panel Data
- Descriptive analysis data is a versatile source of product information for research and marketing professionals.
- Results provide guidelines for identifying sensory properties that can be perceived in a product or set of products.
- Descriptive analysis data is used for:
- Documenting sensory properties of products
- Identifying all sensory properties that can be perceived in a product or set of products
Quantitative Descriptive Analysis (QDA®) Method
- QDA method was developed by the Tragon Corp. in response to dissatisfaction with the lack of statistical treatment of data.
- The method relies heavily on statistical analysis to determine the appropriate terms, procedures, and panelists to be used for analysis.
- Panelists are selected based on their ability to discriminate differences in sensory properties among samples.
- Training involves the use of product and ingredient references to stimulate the generation of terminology.
- The panel leader acts as a facilitator, rather than an instructor, and refrains from influencing the group.
- Attention is given to developing consistent terminology, and panelists are free to develop their own approach to scoring using the 15 cm line scale.
This quiz covers projective mapping, a technique used to group samples based on similarity, and its applications in descriptive analysis. Attributes of products can be added to the 2D plane and subjects can be naive consumers or trained panelists.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
