The Duo-Trio Test is a sensory evaluation method used to assess the differences between two products. In this test, participants are presented with three samples: one reference sample and two test samples. The goal is for the participants to identify which of the two test samples is the same as the reference. This test is commonly used in food and beverage industries to evaluate product formulations or changes. It helps determine consumer preferences and can guide product development. The results can provide valuable insights into sensory characteristics, such as taste and aroma, influencing product quality and marketing strategies.