What is the primary function of a duo-trio test?

The primary function of a duo-trio test is to compare two samples to a reference sample. This test is designed specifically to determine whether a sensory difference exists between the two samples based on a reference point. In a duo-trio test, a panelist is presented with one reference sample and two other samples, one of which is identical to the reference and the other is different. The panelist’s task is to identify which of the two samples matches the reference.

This testing method is particularly effective for detecting subtle sensory differences and is commonly used in quality control and product development to ensure consistency and to evaluate changes in formulations or processing methods. The strength of this method lies in its ability to provide a clear comparative analysis, making it a useful tool in sensory evaluation.

In contrast, consumer preferences focus on overall liking rather than specific differences, while analyzing texture or flavor profiles typically involves more complex evaluations that may not center on direct comparisons to a reference. Hence, the duo-trio test's core emphasis on direct sample comparison solidifies its role in sensory analysis.