Final answer:
Nadine's increased use of curse words in response to her friend's laughter and decrease in use of them at home due to parental criticism exemplifies 'Operant Conditioning', where behavior is influenced by its reinforcing or punishing consequences.
Step-by-step explanation:
The behavior of Nadine using curse words more frequently due to her friend's approving laughter and less frequently at home to avoid criticism from her parents best illustrates Operant Conditioning. This form of conditioning involves learning to associate a behavior with its consequences. When Nadine receives laughter (a reinforcing consequence) as feedback for cursing, she is more likely to repeat the behavior. Conversely, when she is criticized (a form of punishment) for cursing at home, she is less likely to do it in that environment. This adaptive change in behavior demonstrates how reinforcement and punishment influence the likelihood of a particular behavior being exhibited in the future.