Question:
Total how many samples are offered for sensory evaluation in Duo Trio test?
Total how many samples are offered for sensory evaluation in Duo Trio test?
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In a Duo-Trio test, the panelist is presented with three samples: one identified reference and two coded samples, and must match one of the coded samples to the reference.
Updated On: Aug 7, 2026
- Only 3
- Only 2
- Only 4
- Either 2 or 3
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Sensory evaluation methods include difference testing, which is used to determine if a perceptible sensory difference exists between two product treatments.
The Duo-Trio test is a standard discriminative sensory method.
Step 2: Detailed Explanation:
In a Duo-Trio test, panelists are presented with a total of three samples:
1. One identified reference sample, labeled "R".
2. Two coded samples, typically labeled with random three-digit codes.
One of these coded samples is identical to the reference sample, while the other is the test sample (different).
The panelist is asked to taste the reference sample first to familiarize themselves with its sensory characteristics.
They then taste the two coded samples and must identify which of the two is identical to, or different from, the reference sample.
Because three samples are presented to the panelist, it is classified as a three-sample test.
It differs from the Triangle test, where three coded samples are presented without a designated reference, and the panelist must identify the single odd sample.
Step 3: Final Answer:
Therefore, a total of 3 samples are offered in a Duo-Trio test.
Sensory evaluation methods include difference testing, which is used to determine if a perceptible sensory difference exists between two product treatments.
The Duo-Trio test is a standard discriminative sensory method.
Step 2: Detailed Explanation:
In a Duo-Trio test, panelists are presented with a total of three samples:
1. One identified reference sample, labeled "R".
2. Two coded samples, typically labeled with random three-digit codes.
One of these coded samples is identical to the reference sample, while the other is the test sample (different).
The panelist is asked to taste the reference sample first to familiarize themselves with its sensory characteristics.
They then taste the two coded samples and must identify which of the two is identical to, or different from, the reference sample.
Because three samples are presented to the panelist, it is classified as a three-sample test.
It differs from the Triangle test, where three coded samples are presented without a designated reference, and the panelist must identify the single odd sample.
Step 3: Final Answer:
Therefore, a total of 3 samples are offered in a Duo-Trio test.
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