Final answer:
Nancy's behavior in using manners to receive attention from her teacher is an example of operant conditioning, where positive reinforcement encourages the repetition of the behavior.
Step-by-step explanation:
Nancy's repetition of using manners due to attention from her teacher is an example of operant conditioning. Operant conditioning is a form of learning where a behavior is strengthened or weakened by its consequences, such as reinforcement or punishment. In this case, the attention Nancy receives acts as a positive reinforcement, increasing the likelihood that she will continue using manners.
This form of learning is distinct from classical conditioning, where an involuntary response is triggered by a stimulus, and from cognitive dissonance or observational learning.