Emotional Chatting Machine: Emotional Conversation Generation with Internal and External Memory
Table 4: Objective evaluation with perplexity and accuracy.
['Method', 'Perplexity', 'Accuracy']
As can be seen, ECM obtains the best performance in emotion accuracy, and the performance in perplexity is better than Seq2Seq but worse than Emb. In practice, emotion accuracy is more important than perplexity considering that the generated sentences are already fluent and grammatical with the perplexity of 68.0.