Read the text below and answer the question: There was a huge end-of-the-year party right before the end of the semester. Everyone attended. Later, during the summer, most of your group also attended a summer school for amateur psychologists. Now when you’re all back from vacation, it seems as if your memories of the party are different. You talked to some people and realized that those who attended the summer school have similar memories, whereas those who didn’t – have different ones. Question: How do you explain this phenomenon?