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Table 6 

Comparing as potential base classifiers SVMs and Logistic Regression with both L1 and L2 regularization. The classifiers were trained on Toefl11-TrainDev data and the accuracy in the table is evaluated on the Toefl11-Test set.

FeaturesAccuracy (%)
SVMLogRegr (L1)LogRegr (L2)
AG 71.1 57.8 66.6 
CFG 54.5 48.2 50.8 
CHAR1 37.0 32.9 28.8 
CHAR2 57.9 51.3 49.0 
CHAR3 69.7 61.5 63.9 
FUNCW1 55.2 55.2 54.4 
FUNCW2 64.5 51.1 61.9 
LEMMA1 76.2 66.9 70.4 
LEMMA2 78.3 55.6 71.7 
PTB1 37.9 37.4 34.6 
PTB2 50.8 52.3 51.8 
PTB3 56.4 51.8 55.7 
RASP1 48.5 46.0 46.5 
RASP2 63.5 56.8 64.6 
RASP3 65.3 49.3 63.3 
S. DEPS 75.9 49.6 64.7 
TSG FRAGS 75.2 59.0 64.5 
WORD1 77.5 66.3 71.7 
WORD2 78.3 54.2 72.5 
FeaturesAccuracy (%)
SVMLogRegr (L1)LogRegr (L2)
AG 71.1 57.8 66.6 
CFG 54.5 48.2 50.8 
CHAR1 37.0 32.9 28.8 
CHAR2 57.9 51.3 49.0 
CHAR3 69.7 61.5 63.9 
FUNCW1 55.2 55.2 54.4 
FUNCW2 64.5 51.1 61.9 
LEMMA1 76.2 66.9 70.4 
LEMMA2 78.3 55.6 71.7 
PTB1 37.9 37.4 34.6 
PTB2 50.8 52.3 51.8 
PTB3 56.4 51.8 55.7 
RASP1 48.5 46.0 46.5 
RASP2 63.5 56.8 64.6 
RASP3 65.3 49.3 63.3 
S. DEPS 75.9 49.6 64.7 
TSG FRAGS 75.2 59.0 64.5 
WORD1 77.5 66.3 71.7 
WORD2 78.3 54.2 72.5 
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