TRAINING. “Nicolelis argues that even in this simple task, the rats showed some interesting emergent behaviours. Because the encoder always got an extra reward if the decoder chose correctly, it started making movements that were cleaner, smoother and faster than at the beginning. That increased the signal-to-noise ratio in its brain activity and inadvertently provided the decoder with signals that were easier to decipher.”
http://www.nature.com/news/intercontinental-mind-meld-unites-two-rats-1.12522