A girl receives an injection and cries. each time she receives an injection again, the same nurse gives it. her mother notices that the child now cries when she sees this nurse even if no injection is given. this is an example of negative reinforcement. classical conditioning. operant conditioning. fixation.

This is an example of classical conditioning. Just as Pavlov's dogs continued to salivate upon the sound of the bell, even when there was no longer any food presented to accompany it, the girl continues to cry when she sees the nurse, even though the nurse is not carrying the needle or planning to give an injection.