Figure 9From: Preferred analysis methods for Affymetrix GeneChips revealed by a wholly defined control datasetDEG detection sensitivity and specificity as a function of spiked-in fold change level. (a, b)ROC curves using the composite statistic, and different definitions of the true-positive probe sets (criteria given in the legends; FC, spiked-in fold change). The true negatives remain the same for all curves (the probe sets which were not spiked in, or were spiked in at 1x).Back to article page