Among the acceptability scores, (overall acceptability) was used
to calculate the sensory quality index (SQI) because the overall
acceptability score is a representative questionnaire for the consumer’s
integrated response to the product. An individual consumer’s
overall acceptability scores were averaged for each
product. The SQI was calculated as a ratio of the overall acceptability
of a product at the end of its shelf life to that at the beginning of
its shelf life (Eq. (1)).