Distinct learning paradigm with their corresponding pollination scenarios. Learning can be broadly categorized into non-associative learning (habituation and sensitization), associative learning and operant (instrumental) conditioning. Associative learning occurs through the pairing of two previously unrelated stimuli, whereas non-associative learning occurs in response to a single stimulus. Associative learning occurs in rewarding or punitive flower visits. Non-associative learning comprises sensitization and habituation, while habituation is more likely to occur in rewardless visiting behavior.