Why is the main measurement instrument in sensory sciences considered flawed?

The main measurement instrument in sensory sciences is considered flawed primarily because humans, who serve as the evaluators, are inherently variable and susceptible to various forms of error and bias. This human variability includes differences in sensory perception, emotional state, prior experiences, and even cultural background, all of which can significantly influence the results of sensory evaluations.

Unlike more objective measurement tools, human responses can be inconsistent, leading to unreliable data. Conditions such as fatigue, distraction, or even the physical environment can further exacerbate this variability. As a result, while sensory evaluation is essential for understanding human responses to products, it is challenging to achieve the level of precision and control seen in instrumental measurements. This inherent lack of uniformity in human perception makes it difficult to establish consistent standards across different studies or evaluations, highlighting the challenges faced in the field of sensory science.