The investigation of whether sensory differences exist between products is often conducted using discrimination methodologies such as the triangle, same-different, 2-alternative forced choice or tetrad tests. Typical research involves an ingredient replacement for cost saving or regulatory requirements (“matching” objective) or product modification where the scientist must confirm that a quality improvement has actually been achieved. Many tools are available to the sensory scientist, including rating scales (e.g., descriptive analysis) and studies involving consumers for hedonic investigations, but discrimination testing has the advantage of not requiring the same level of expertise (descriptive analysis) or large numbers of subjects (hedonic-based investigations).