In the first post-hoc test, we found a significant difference between BEST and WORDS-TRI (t a V:H,p < I:VTxIH 12 ), indicating that there is room for improvement of our ranker.
in considering the top scoring feature sets, we did not find a significant difference between WORDS-TRI and WORDS-BI (t a P:Q, p < H:HPP), from which we infer that the difference among all of WORDS-TRI, ALL-BI, ALL-TRI and WORDS-BI is not significant also.