The end result needed is the reward: The dog does everything in hopes of a reward at the end. (siriusdog.com)
I would hope that an emotionally mature adult doesn't cite fear and / or hope of reward as their primary motivation for socially positive behaviour. (religion.blogs.cnn.com)
That didn't stop him from walking on his hind legs in hopes of a reward when I carried the bowls into the kitchen. (dogplay.com)