Joseph told his buddies at work a joke that made fun of women. to his surprise, no one laughed at the joke, and one person even scolded him for telling it. as a result, joseph decided never again to tell a joke like that at work. joseph's experience is an example of what principle of learning

I believe the answer is: the law of effect
the law of effect stated that when we do a certain action that produce a desired effect, we would very likely to repeat that action in order to obtain that positive effect again in the future. This law is what being implemented in psychological conditioning process.