CSA Research Methodology & Design 3

Question 1

A project team asks whether a cost-reduced formula is perceptibly different from the current product. Which test category fits best?

Accepted Answer

Discrimination (difference) test

Answer

The question is whether any difference exists, which is the purpose of discrimination testing.

Question 2

For a similarity (equivalence) test, which risk should be set small to protect against missing a real difference?

Accepted Answer

Beta (β)

Answer

In similarity testing, beta is kept small so a true difference is unlikely to go undetected.

Question 3

Testing the same samples with the same panelists in separate sessions is mainly done to:

Accepted Answer

Estimate panelist and session repeatability

Answer

Replication lets researchers estimate within-panelist error and check consistency over time.

Question 4

A strongly flavored sample served first lowers ratings of the next mild sample. This is an example of:

Accepted Answer

Contrast/carryover effect

Answer

Carryover and contrast effects occur when a prior sample influences perception of the following sample.

Question 5

Which practice best controls for carryover between samples within a session?

Accepted Answer

Using palate cleansers and timed rest intervals

Answer

Palate cleansers and rest periods reduce sensory adaptation and residual effects.

CSA - Certified Sensory Analyst Practice Test