Boxplots of visual stimulus-evoked activity with and without VIP photoactivation, averaged 0-1 s from visual stimulus onset, for each cell class (Wilcoxon signed-rank tests for differences in activity: PYR, n = 1,567 cells, p = 4.52 x 10-187; SOM, n = 30 cells, p = 5.71 x 10-4; VIP, n = 85 cells, p = 1.17 x 10-15; PV, n = 40 cells, p = 3.57 x 10-8).