Answer:
proactive interference
Explanation:
In psychology, proactive interference is considered as one of the two different types of interference and is described as a phenomenon that occurs when an individual's old or former memories tends to interfere with his or her capability of encoding as well as retrieving a piece of new information.
According to various psychologists, it seems very difficult for an individual to create or develop a specific new memory that tends to contradict or oppose or is too similar as compared to the older memories.
According to the question above, Jill is demonstrating proactive interference.