Adding noise can reduce response biases in addition to improving perceptual performance.

Summary: Have you ever noticed that a little bit of background noise can sometimes help you focus? Scientists call this "stochastic resonance." It turns out that adding just the right amount of static or random noise can actually help your brain process information better. Not only does it make your senses sharper, but it also helps you make fairer, less biased choices. It is like turning up the static on a radio just enough to make a hidden melody crystal clear!