An Automatic Approach for Document-level Topic Model Evaluation
Table 2: Topic coherence scores (npmi)
['[BOLD] Model', '[BOLD] apnews', '[BOLD] bnc']
We first compute topic coherence for all 5 topic models over apnews and bnc using npmi Lau et al. We see that lda and cluster perform consistently well across both datasets. hca performs well over apnews but poorly over bnc. Both ctm and ntm topics appear to have low coherence over the two datasets.