In Pavlov’s experiment, the conditioned response resembles the response elicited by the unconditioned forcing) stimulus: that is, salivation is a dog’s normal response to food.
But in operant training to forced behaviour bears no resemblance to the behaviour normally elicited by the reinforcement stimulus (for example, rolling over is not a dog’s normal response to food). Still, the learning that takes place exhibits such principles as extinction, generalization, and discrimination.