Table 1.

Accuracy of unexpected word identification.

Unexpected word identification method	P	R	F1
Baseline	46.3	74.0	57.0
TF-IDF	72.1	79.5	75.6
Log-odds	70.5	79.5	74.7
Sum(TF-IDF, Log-odds)	72.2	83.3	77.4
Max(TF-IDF, Log-odds)	69.9	83.3	76.0
TF-IDF+WordNet	83.8	80.5	82.1
Log-odds+WordNet	82.1	83.1	82.6
Sum(TF-IDF, Log-odds)+WordNet	84.2	83.1	83.7
Max(TF-IDF, Log-odds)+WordNet	83.3	84.4	83.9
TF-IDF+WordNet+topic	85.7	77.9	81.7
Log-odds+WordNet+topic	83.8	80.5	82.1
Sum(TF-IDF, Log-odds)+WordNet+topic	86.1	80.5	83.2
Max(TF-IDF, Log-odds)+WordNet+topic	85.1	81.8	83.4