Hierarchical Recurrent Attention Network for Response Generation
Table 1: Perplexity results
['Model', 'Validation Perplexity', 'Test Perplexity']
HRAN achieves the lowest perplexity on both validation and test. We conducted t-test on test perplexity and the result shows that the improvement of HRAN over all baseline models is statistically significant (p-value <0.01).