Generally, the MCST-SVM is competitive against all the classifiers presented in (Pang and Lee, 2005), and in some cases significantly outperforms these methods.
the hierar-  chical classifier outperforms OVA+PSP by 7% in the three-class case for Author A (statistically significant), while in the four-class case the MCST-SVM outperforms the best competing methods by 7.72%, 3.89% and 4.98% for Authors A, B, and C respectively (statistically significant).