No normalization 68.52 ( 70.45 ) 84.34 ( 82.8 ) 37.4 ( 45.2 ) 67.8 ( 67.1 ) Table 2 : Binary logistic regression 10-fold cross validation with different feature normalization approaches : Scores within brackets are when the female speaker data is removed ; S = Stressed , US = Unstressed , MCB = Majority Class Baseline .