CRC Sensory Evaluation Principles 2

Question 1

In a triangle test with no real difference between products, what is the probability of a panelist picking the odd sample by chance?

Accepted Answer

1/3

Answer

Three samples with one odd one gives a 1-in-3 guessing chance.

Question 2

A duo-trio test has a chance probability of:

Accepted Answer

1/2

Answer

The panelist chooses between two samples to match the reference, so chance is 50%.

Question 3

How many unique serving-order combinations exist for a balanced triangle test (two A, one B or two B, one A)?

Accepted Answer

6

Answer

AAB, ABA, BAA, BBA, BAB, ABB give six combinations.

Question 4

Which test is most appropriate when a chef wants to know whether a reformulated sauce is MORE salty than the control?

Accepted Answer

Directional paired comparison

Answer

Directional paired comparison asks which sample is higher in a specified attribute.

Question 5

A Type II (beta) error in a difference test means:

Accepted Answer

Failing to detect a difference that truly exists

Answer

Beta risk is missing a real difference.

CRC - Certified Research Chef Practice Test