英語学習では覚えておく必要のある事が有ります。しかし、英語のレッスンで、すべての自分の生徒が同じく頑張ってるのかどうか確信が持てない事が有ります。たぶん、それは、どのくらい忘れるのか忘れていることが原因と思います。どのくらい忘れるかを覚えていれば、もう少し復習を頑張ろうと思うかもしれません。そんな、「忘却」についてのお話です。
The forgetting function （忘却の関数）
We forget fast. In fact, we generally forget exponentially.
For maths nerds, how much you remember (R) is a function of time (t) and the strength of the memory (S):
The more time that passes, and the less powerful your memory, the less you remember.
No surprises there!
In pictures, that looks like this:
In less than one day, you have forgotten half the stuff you learned. After 5 days, it's almost all gone!
This is a very simple picture. Of course, there are other factors at play. If you are stressed out and tired, you'll forget faster. Things that are difficult are harder to remember. And memory is a complex thing. You can remember somethings very easily, and others never.
But let's assume you have a great memory. If you have an incredible memory, and it is five times better than average, you still forget more than half of the stuff you learn in only 5 days.
And after 10 days, you can only remember 10% of what you learned.
What should you do?
From this simple model, there are two things we can control: time and the strength of the memory.
The most important thing is to reduce the time between learning sessions. That means you need to review within 24 hours of your class—the sooner the better. That's also why learning one day a week is not enough. You need to take lessons through the week.
You should also make sure you are developing strong memories when you learn:
- take your time to understand the content of your lesson;
- use memory techniques to make things stick in your mind easier.
A good teacher will make you do this in class. They will go slowly and not rush. They will repeat things, make them interesting and help you understand and make connections between ideas. This gives you ways to make your memory strong.
If you want to remember what you learn, don't forget how much you are forgetting!
