Case studies such as HM support Tulving's theory. After HM's hippocampus was removed he could not remember new events or new factual information. He could, however, learn how to do new tasks - when asked to draw a star through a mirror he got quicker each time he did it. This gives evidence to the fact that there are multiple LTM stores. However, research based on case studies cannot be generalised as it is based on one individual person.