Evaluation of the mixed directional FDR. Evaluation of the mixed directional FDR (α=0.05). Each plot includes results for the four different correlations settings (among genes): ρ=0, 0.2, 0.5 and 0.8. The first plot shows the control of mdFDR for Procedures 2, 3 and 4 (only one set of results are reflected because the mdFDR for the three procedures are almost exactly identical). The second plot shows the non-control of mdFDR for the simple B-H method.