Positive reinforcement training is a method of dog training that involves rewarding good behavior rather than punishing bad behavior. This technique is based on the idea that dogs are more likely to repeat behavior that is rewarded than behavior that is punished. Aversive training, on the other hand, uses punishment such as shock collars, choke chains, or physical force to stop unwanted behavior. Positive reinforcement training is more effective in the long term, as it strengthens the bond between the dog and the owner and builds trust and confidence in the dog.