Principal component factor analyses of the performance in the learning battery as well as gene expression values for the PFC genes identified through the microarray analysis as being differentially expressed.

Principal component factor analyses of the performance in the learning battery. Columns (replication 1, replication 2, and combined) show how each task loads on the general learning factor in each replication and in a combined analysis. The structure of the resulting general learning factor in each replication was stable and explained between 41–42% of the variance in performance in the learning battery.