When analyzing the results of a Pairwise Comparison procedure, the Bradley-Terry-Luce
(BTL) estimation method can be used as an alternative to the standard linear method to convert
pairwise preference ratings into a preference score for each sound.
Preferences are modelled using a ratio scale between individual preference ratings, rather
than on a difference scale. The overall preference rating of a sound can then be estimated
on the basis of the odds’ ratios:
