Final answer:
In sensory evaluation, variables such as environmental conditions, sample presentation, panelist selection and training, and testing protocol are controlled.
Step-by-step explanation:
In sensory evaluation, several variables are controlled to ensure accurate results. Some of the variables that are controlled include:
- Environmental conditions: This includes controlling factors such as temperature, humidity, and lighting conditions to create a consistent and controlled testing environment.
- Sample presentation: The way the samples are presented to the sensory panel can greatly impact their perception. Therefore, variables such as serving temperature, serving order, and portion size are controlled.
- Panelist selection and training: The panelists chosen for the evaluation should have a good sensory acuity and be trained to recognize and describe sensory attributes accurately. Control is exercised over the selection process and training of panelists.
- Testing protocol: The protocol for conducting sensory evaluation is standardized to ensure consistency across different evaluations. This includes the use of evaluation forms, scoring systems, and procedures.