Dually Interactive Matching Network for Personalized Response Selection in Retrieval-Based Chatbots
Table 4: Ablation tests of removing either persona-response matching or context-response matching in the DIM model conditioned on original self personas.
['[EMPTY]', '[BOLD] hits@1', '[BOLD] MRR']
We can see that both the persona-response matching and the context-response matching contribute to the performance of the DIM model. It is reasonable that the context-persona matching is more important because contexts provide the fundamental semantic descriptions for response selection. On the other hand, the single persona-response matching can also achieve a hits@1 of 48.8% and an MRR of 60.9%, which shows the usefulness of utilizing persona information to select the best-matched response.