Which of the following is NOT a purpose of triangulation tests?

Triangulation tests are sensory evaluation methods primarily used to identify differences or similarities between products. The main objectives of these tests revolve around comparing distinct products to find significant differences in sensory characteristics.

Testing differences between products is a core purpose, as triangulation seeks to determine if consumers can distinguish between them based on specific attributes. Screening panelists is another relevant use since these tests often require trained assessors who can effectively discern between product variations.

Measuring consumer preferences, however, is not the primary focus of triangulation tests. Preference measurement usually involves different methods, such as hedonic scaling or preference mapping, which directly ask consumers to rank or rate products based on liking rather than solely determining if they can detect differences. Similarly, testing similarities can be achieved through triangulation tests, as they assess the degree to which products are perceived as alike or different.

Thus, measuring consumer preferences stands out as the purpose that does not align with the typical objectives of triangulation tests.