How long can the surprise memory before the final exam last?

Personal experience tells you that the better the surprise effect before the college final exam, the faster the forgetting speed, and the worse the memory preservation effect, so that you can completely believe Ebbinghaus forgetting curve and take it as truth. This is the same reason that we have changed from a university tyrant who knows everything about astronomy and geography before the college entrance examination to a disabled person who can only play mobile phones after the college entrance examination. How easy it is to end the exam suddenly and how much knowledge you have forgotten.

When I was a freshman, I still kept the good habit of studying hard in high school, and I lost to my mobile phone in less than a week. It's a pleasure to play in class and after class, to go back to the dormitory, and to brush Weibo and visit Taobao every day. I almost have to make up all my mobile phones that I haven't played in high school for three years, so the final exam is coming, and I'm also very anxious. When I opened the book, I found that we didn't know each other at all, so I had to play surprise attack.

We have three subjects in the final exam, math, English and specialized courses. I didn't start reviewing until the last two weeks. It's really a book a day and a semester a week. Because of the time, each book can only be roughly opened once, and then do the questions according to the key points you understand. Advanced mathematics is completely a problem-solving method, and English sticks to my high school foundation until the end. As a professional course, like a gobbledygook, I didn't know what to say, so I memorized the chapters, found the key points of Xueba's painting, and then went to the examination room with the luck of believing that I wouldn't fail the exam. After the exam, I began to be confused, and.

After two days, I finally found my grades and knew that I didn't fail, so I started a carefree holiday. I forgot all my homework and bored the calculus formula before the exam. Ask me after the exam. I may not even know what the first chapter of calculus says. This is the consequence of the surprise before the exam. Because the main purpose of the assault is to pass the exam rather than really learn knowledge, the brain will have a feeling of "automatically cleaning up" the memory storage.