Tricia is a graduate of the Karen Pryor Academy, which is dedicated to 100% positive reinforcement training (no punishment, corrections or aversive of any kind). Training is reward marker based; we mark behavior that we like with a "click" or a "yes" and ignore behavior we don't like. Behavior that has been rewarded gets repeated and behavior that gets ignored, extinguishes.
Because your dog is making choices to do behaviors you desire and that you have rewarded him/her for previously, you learn how to communicate with each other and an increasingly strong bond is built. Instead of "commanding" your dog to do what you want you work collaboratively towards instilling mutually beneficial behaviors.