2 guides on this topic
Memory
What each memory question is really asking, how to structure the answer, and where the marks are likely to sit.
Compare and contrast the theories of memory developed by Ebbinghaus and Bartlett, discussing the key concepts of each, then judge which elements of each theory you find valid and which lack validity, supported by scholarly sources.
Compare and contrast needs axes. Duration, capacity, code and the evidence that each system can fail on its own will carry the whole post.