Following the setup of (Hsu and Ku, 2018), in Friends and EmotionPush, we only evaluate the model performance on four emotions: anger, joy, sadness, and neutral, and we exclude the contribution of the rest emotion classes during training by setting their loss weights to zero.
(b) The two variants, HiGRU-f and HiGRU-sf, can further attain +0.9 and +1.5 improvement over Hi-GRU in terms of WA and +1.0 and +1.2 improvement over HiGRU in terms of UWA, respectively.