Figure 14. Authorship classification performance of 8 methods evaluated in terms of Matthews' correlation coefficient for Shakespeare, resulting from a 10-by-10 fold cross validation of his 20 highest and 20 lowest CM_–1 scoring marker words.

These 8 methods were selected as those which yielded the best classification performance for Fletcher, Jonson and Middleton. The results of individual folds are presented in blue/green, with the average performance for each method in red. The performance across all 8 methods is demonstrated to be above 80%, with the best performing method () yielding classification performance of 99%.