The behaviors we have the ability to influence most often are the learned behaviors. When teaching a bird a behavior, many humans use the same methods they would use to train the family dog. This method in many cases is based on dominance, a negative reinforcer. Birds, like cats, respond best to positive reinforcement. The most rewarding approach for trainers and bird alike is to encourage the bird to learn the desired behavior using positive reinforcement.
Dominance has very little use in bird training.
Training a desirable bird behavior is a bit more difficult than just giving a bird a treat when it does something right. There are some key elements that are important in training new behaviors. The first principle of training is to interpret the motivation for an action. Every action has motivation based on gaining pleasure or avoiding pain. Most everything birds do is linked to gaining pleasure or avoiding pain.