Based on the exploratory factorial analysis, we could demonstrate
that the overall liking score for a ‘‘sensation” was unidimensional.
Cronbach’s alpha confirmed that there was a good internal
consistency among items of the sensation, especially for salty and
sweet sensations, and to a lesser extent for fat. This lower degree of
consistency for fat must be due to the complexity of the sensation
and the various ingredients for fat. To our knowledge, no previous
study has checked the internal validity of their sensory tool, as
undertaken here.
The distribution of the overall liking score of each sensation was
close to normality, as shown by the Skewness and Kurtosis indices,
which were lower than 2 and 7 respectively