Have you ever been in a situation where you study extremely hard for an exam – sitting at your desk for 10 hours a day, reading and re-reading documents, using highlighters in all kinds of colors – only to find yourself completely unable to remember anything when you enter the exam room?
Or have you ever witnessed a friend who clearly studies a lot less than you, still goes out on weekends, gets enough sleep, yet his scores are always outstandingly high?
Even in your daily work, you have read how many specialized books, attended how many courses, stored dozens of documents in the “to read later” folder, but when it comes time to apply practically to solve problems, your mind goes blank?
If the answer is yes – then I want to confirm that: It’s not because you’re not smart enough, and those who achieve better results than you are also not due to luck.
There is a scientific truth about how the human brain works that very few people teach us. And once you understand this principle, you will never look at learning the same way again.
When I first set foot in the US to study, I brought with me a set of study “weapons” that were very familiar from my time as a student in Vietnam: read textbooks carefully, read them over and over again, highlight them thoroughly, copy summaries of lessons into notebooks, and stay up late plowing until 2 am. I used to be very proud of my hard work.
But then I met my classmates in America. There are students who clearly spend less time studying than I do. They still freely go out on weekends. They always get enough sleep before the exam day. In particular, their textbooks are clean, with almost no highlight ink stains.
Yet their scores are always higher than mine.
For the first time in my life, I began to doubt a concept that I thought I understood very well: What is truly hard work?
It took many years later, when I officially entered medical school and had the opportunity to deeply interact with neuroscience, to understand what had happened. Below are 3 core things that I wish I had been taught early on – and what I want to share with you today.
1. The feeling of “understanding” is the most subtle deceiver: The illusion of mastery
The human brain possesses an extremely sophisticated defense mechanism that scientists call the “illusion of competence”.
This classic concept has been thoroughly researched and proven by psychologists Henry Roediger and Mark McDaniel at the University of Washington. They came to a rather harsh clinical conclusion:
The method of reading and re-reading books is one of the least effective ways to learn, but it is the most commonly abused method by students around the world.
The reason lies in the operating mechanism of synapses. When you re-read a passage or a page of a book for the second or third time, your eyes glance at familiar characters and terms. The brain will now automatically send out a signal: “Ah, I’ve seen this already”.
That feeling of familiarity immediately creates a very sweet illusion: the feeling that you have truly understood, remembered and memorized that knowledge.
But medical science proves: Familiarity is absolutely not the same as remembering.
This is the reason why you can read a chapter of a book up to 5 times, but just close the book and you immediately forget 70% of the content. This is also the reason why I used to study for exams and felt “sure”, then when faced with the actual exam, I was powerless to reproduce the knowledge. The feeling of “thinking you understand” and “really understanding” are two completely different mental states.
2. Consuming information is not learning
This truth is not limited to studying for exams in the classroom, but it is also absolutely true in work and daily life.
In the digital age, we constantly consume: reading a lot of shared articles, registering for a series of online courses, pressing the button to save a lot of useful documents into archive folders for later reading. Each time we complete that reading or storage, the brain releases dopamine, creating a false sense of joy that we have learned something new.
But when you actually need to use that piece of knowledge to solve a clinical case or a real-life problem at work, your brain is completely blank.
Because during that process, you are simply doing the act of reading. You have never studied at all.
This is a somewhat uncomfortable truth, but I have to say it frankly: Most of the time we mistakenly think we are making an effort to learn, when in fact we are just consuming information. And passive consumption of information will never create real change in your abilities.
3. Our brains evolved to forget
There is a biological principle that neuroscience has confirmed but is rarely talked about: Our brains are designed and evolved to forget.
It sounds counterintuitive, but if analyzed from a survival perspective, this is completely reasonable. If the brain remembers every detail of every object, image, and sound that we encounter every day, the nervous system will go into overload in just a few hours.
Therefore, the brain possesses an extremely harsh filter: Only information that is actively used is allowed to be retained. Any information that can only be seen passively will be mercilessly deleted by the system.
- Read the book again = You are just stopping at seeing (passive).
- Self-testing, retrieving knowledge = You are forcing your brain to use (actively).
This is the decisive boundary between two learning methods that from the outside seem very similar. A method that only gives you a false sense of security that you are making progress. The remaining method really helps you break through your abilities.
4. Don’t confuse busyness with progress
In a medical lecture hall in America, there is a famous saying that the longer I travel, the more profound I find it:
“Don’t confuse activity with progress.” (Never confuse busyness with real progress).
Being busy always gives us a great sense of security and self-soothing. When you sit in a chair studying for 12 hours, you give yourself the right to comfort yourself: “I tried my best”.
But in the real world, trying your best blindly is not as valuable as trying your best. Life – like any competitive exam (like the USMLE), any work project, or any big goal – doesn’t care how much sweat and tears you put in. It only cares about a single result: Did you follow the method correctly
💡 Real-life exercises test the brain’s actual memory capacity
The next time you learn something new, whether it’s a book chapter, a clinical lecture, or an online course, try doing this little exercise:
- After finishing studying, be brave enough to close all your books and documents.
- Take out a completely white sheet of paper.
- Write down everything you can remember in your head without turning the book back over.
- After finishing writing, open the document for direct comparison.
The comparison results on the page will certainly surprise you. The vast gap between “I think I remember” and “I really remember” is what determines your entire success or failure in study and career.
Conclusion
If the human nervous system has such a tendency to automatically forget, then why are there still doctors and experts who can accurately remember thousands of complex medical knowledge over many years? What is different about their brains compared to ours?
The answer actually does not lie in their innate brain structure, but in the fact that they know how to avoid a classic mistake in their learning methods that almost everyone is making. I will analyze in depth and tell you about this secret in the next article.
If you want me to quickly write the next article to decode this top memorization method, please leave a comment “LEARNING” right below the article!
Please share this article widely with friends and colleagues if you feel this information is truly useful!
Dr. Christina Nguyen
Phoenix Medical Academy
