Methods to measure responses

Question 1

What is the “classification” method

Answer 1

• subjects are asked to select attributes which describe stimulus (nominal, non parametric data)
  -No attempts to standardize terms
  ie. Juic is: sweet, sour, pulpy, thick etc.

Question 2

With classification, what should you consider when selecting terms?

Answer 2

Has to be based on the characteristics of the actual product

Question 3

What are the limitations of the “classification” method?

Answer 3

1. Confusion: subjects can associate terms with goodness or badness (not objective)
2. Caveats - ie there is pulp in the orange juice that was not included in the list of terms - panelist would have to describe

Question 4

What is the grading method?

Answer 4

Scaling that depends on expert grades who learn the scales used from other grades

Question 5

What is the “ranking” method?

Answer 5

When subjects recieve 3 or more samples to arrange in order of intensity need little training

Question 6

What are the limitations of “ranking”

Answer 6

1. All products must be considered before a judgement is made
2. Must specify characteristics and direction of ranking
3. Data provides no indication of strength of attribute or magnitude

Question 7

What is the “scaling method”?

Answer 7

Use of numbers or words to express intensity (ie scale from 1 to 9)

Question 8

What does the validity of scaling depend on?

Answer 8

1 - selection of the appropriate scaling technique
2 - training of the panelist on how to use the specific scale

Question 9

Scaling

What are the 3 kinds of scaling?

Answer 9

• Universal scaling
• Product specific scaling
• Attribute specific scaling

Question 10

What is universal scaling?

Answer 10

• Considers all of the products/intensities theu have experienced as a reference
• Rated on an absolute and universal basis

Question 11

What are the advantages and disadvantages of universal scaling?

Question 12

What is product specific scaling?

Answer 12

Scaling where panelists only consider their experience within the selected product category (products from different categories cannot be intercompared)

Question 13

What are the advantages and disadvantages of product-specific scaling

Question 14

What is attribute specific scaling?

Answer 14

Where panelists consider their experience of the selected attributes across all products (each attribute rated independantly from eachother)

Question 15

What are the advantages and disadvantages of Attribute specific scaling?