Focus on… EuroSense- Part 1: Liking and Temporal Methods?

Do you occasionally or regularly carry out consumer tests?

If so, it might have already occurred to you that some consumers provide an opinion on the scale too quickly! This phenomenon indicates that the rating might not take into consideration the entire temporality of the product evaluated, which can have a strong negative impact on the conclusions drawn. This is particularly true if your products are characterized by, for example, specific aftertastes that can result in discrimination of the evaluated products.

You might also be wondering about the impact of a temporal descriptive task such as a TDS or TCATA on the hedonic scores you have obtained from the same consumers?

To answer these questions, we would like to present our research on this topic during the next EuroSense conference to take place in Verona, Italy on September 2-5, 2018!

Here is a preview of the abstract accepted for an oral presentation at the symposium:

“Several authors have proposed combining TDS or TCATA with liking. This raised the old question of whether liking scores obtained after a descriptive task are comparable to classic liking scores. If they are not, it could be due either to the descriptive task or to the delay in displaying the liking scale due to the time required by that descriptive task.

The present paper features an experiment in which 240 naïve French consumers tasted 5 dark chocolates. The consumers were split in four groups of 60. The first group did a classic liking test in which the scale was available at mouthing, whereas it was displayed on panelist computer screens of the second group only one minute after mouthing. The third and fourth groups performed TDS and TCATA respectively before giving their liking scores. The same five dark chocolates were evaluated in each group in a balanced order of presentation.

Two-way ANOVAs showed that liking scores after TDS or TCATA were less discriminative than in the two first groups. However, the split-plot ANOVA showed that the product by panel interaction was not significant, indicating that product differences were globally the same in the four groups. Furthermore, liking scores were given on average 36 seconds after mouthing in the first group, whereas average TDS and TCATA duration was 66 seconds; this suggests that classic liking scores were given before the product could be fully perceived. Finally, the overall level of liking scores was slightly higher in the second group compared to the first group, which in turn had a slightly higher level of liking than TDS and TCATA groups. These data suggest that delaying liking responses increases scores when no task is done during the delay and on the contrary decreases scores when a sensory task is done.”

Not attending the EuroSense conference this year? Please contact us to receive more information on this topic!

We also have three other abstracts that have been selected for displayed communications at EuroSense. Stay connected! We will unveil more during our next “Focus on EuroSense!”

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Samia Babou : samia.babou@sensostat.fr

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