Part 3 Flashcards

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1
Q

What are the advantages and disadvantage of internal and external panelists?

A

Internal:
Adv:
1. People on the spot
2. No payment
3. Confidentiality
Disadvantages:
1. Knowledge of product may influence results
2. Availability
3. Difficult to replace panelist

External:
Adv:
1. Availability
2. Large number
3. No risk of offending if not chosen
Disadv.
1. Expensive
2. Must be trained
3. Old or student
4. Risk of loosing after payment

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1
Q

What is nominal data?

A

Categorical assignment of numbers to
items, as if merely labelling. E.g. gender, age etc

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2
Q

What is ordinal data?

A

Arranging products in an ordered series, e.g. slight, moderate, strong.

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3
Q

What is interval data?

A

Interval data is measured along a numerical scale that has equal distances between adjacent values.

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4
Q

What is a food action scale (FACT)?

A

A Food Action (FACT) scale is a form of hedonic scale. It is assumed that what
the panellists say they will do is correlated with how much they like the product

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5
Q

What type of test should one perform for categorical data?

A

Non -parametric tests such as Friedmans test

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6
Q

What type of test should one perform for continuous data?

A

ANOVA and if difference observed further analysis can be conducted such as least significant difference.

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7
Q

What is a disadvantage of leas significant difference test (LSD)? And the Scheffe’s test

A

That difference may be found even if they are no present.

On the other hand, the Scheffe’s test is too precise and might no notice differences where they actually are.

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8
Q

What is the most commonly used test to find out difference between pairs?

A

The Tukey’s test.

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9
Q

What is ratio data?

A

Data where the panellist will be given a product which is used as reference for ranking or the panelist is free to choose the ranking and following samples change according.

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10
Q

What is time intensity testing and when would you use it?

A

Analysis of change in flavor, texture over time by scoring at interval or continuous tracking. Might be very laborious work as different panelist might chew differently and/or use the continuous tracking paper differently.

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11
Q
A
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