URL: http://www.youtube.com/watch?v=gE6ixMxrCuo
Comentários: The omission procedure involves withholding reward following particular response. In this video, a pigeon that has initially undergone autoshaping training is placed on an omission schedule. The first two trials show the bird pecking at the key and not receiving grain. Eventually, the bird learns to stop pecking, but note that orientation toward the key continues. (0:58)