Which of the following is NOT a type of discrimination testing used in coffee?

The type of discrimination testing that is identified here is the binary choice test. This testing method typically involves a situation where a panelist is presented with two options and asked to select one based on their preference or perceptual differences. While it helps in assessing preferences, it doesn't classify as a standard form of discrimination testing, which typically aims to evaluate whether a perceivable difference exists between samples.

In the context of coffee tasting, triangle tests, duo-trio tests, and difference from control tests are specifically designed to discern subtle differences in flavor, aroma, or other sensory attributes between samples. Triangle tests involve presenting three samples, two of which are the same, to determine if the taster can identify the odd sample out. Duo-trio tests give panelists a reference sample and ask them to identify which of two subsequent samples is the same as the reference. Difference from control tests directly compare a new product against a standard to identify any significant differences. These methods are foundational for sensory analysis in coffee, focusing on the ability to distinguish between products rather than just making a choice.

Thus, the binary choice format does not align with the rigorous methodologies typically employed in discrimination testing, making it the correct answer in this context.