PV and SST stimulation impairs, while VIP stimulation improves, contrast increment detection. A, Representative PV mouse behavioral performance from a single contrast increment session. Data are false-alarm corrected performance for trials with (blue) and without (black) activation of PV interneurons as stimulus contrast is varied. Curves are best-fitting Weibull functions that were used to determine detection thresholds (dotted vertical lines) and 95% confidence intervals (solid horizontal lines). B, Summary of PV stimulation effects. Circles depict the contrast increment detection thresholds from individual sessions with (y-axis) and without (x-axis) PV neuron stimulation (five mice, 47 sessions). Filled circles indicate a significant shift in threshold (44/47; bootstrap). C, Representative behavioral performance from a single session in a SST mouse. Same format as A. D, Summary of SST stimulation effects (three mice, 39 sessions; significant threshold difference in 34/39 sessions). Same format as B. E, Representative single session behavioral performance from a VIP mouse. Conventions as in A and C. F, Summary of VIP stimulation effects (three mice 43 sessions; significant threshold difference in 40/43 sessions). Same format as B, D.