NLU Model Comparison Explanation Needed

Hi All,

Can Someone explain to me the lines in this comparison figure, I couldn’t figure out the meaning of the lines there. I have 4 Configurations as you see with and without dense features (LaBse) and with and without Masking.

Another Question: I used TensorBoard to visualize the intent performance on the test set, but It shows only the intent performance on training set. I didn’t define a validation set. Is it possible to visualize the performance on the test set as you see in the figure no visualization for the test set.

I would appreciate your explanations. Thank you! Cheers