Table 7.

Average coherence measure score.

Model	Average UMass	Average UCI
CorExQ9	–3.77	–2.61
LDA	–4.22	–2.76
NMF-LK	–3.97	–2.58
NMF-F	–4.03	–2.36

Abbreviations: UCI = The UCI measure was first introduced by researches in University of California, Irvine; UMass = Umass measure was first introduced by researches in University of Massachusets. Related papers using these measures are just using UCI and Umass directly; LDA = latent Dirichlet allocation; NMF-LK = Kullback-Leibler divergence non-negative matrix factorization; NMF-F = Frobenius normalized NMF.