Fig 8. AUPR scores of the NN-MT and RN-MT multi-task methods as a function of the $n_e^{-}/n_e^{+}$ ratio, for a number of extra-task positive pairs $n_e^{+}$ varying from 1 to 50.

(a): NN-MT, θ = 0.20. (b): NN-MT, θ = 0.80. (c): RN-MT, θ = 0.20. (d): RN-MT, θ = 0.80. The two methods are trained with intra-task and extra-task examples that are both dissimilar to the tested pair (percentile-based similarity thresholds θ of 20 and 80). Exact values can be found in Supporting Information respectively in S14–S17 Tables.