The most common way people study is one of the least effective. Here is what works instead.
Open a textbook, highlight a few lines, read them again. It feels productive — the words grow familiar, and familiarity feels like knowing. But familiarity is a trap. When the test comes, the words you recognised on the page refuse to come back on their own.
Decades of research point to a better method, and it is almost the opposite of re-reading: try to recall the material from memory. Close the book and ask, What did that say? The struggle to retrieve — even when you fail — is what strengthens the memory.
Every time you pull a fact out of memory, you make the path to it a little easier to travel next time. Re-reading lays the fact down again on the surface; retrieval carves a groove. Psychologists call this the testing effect, and it is one of the most reliable findings in the science of learning.
It will feel harder than highlighting. That difficulty is the point — it is the feeling of learning actually happening.
The same article, told in plain words — for younger readers, or for anyone who wants the point quickly.
Here is what most people do before a test: read the page, highlight a few lines, read it again. It feels like it is working. The words start to look familiar, and familiar feels like known.
It is not the same thing. When the test comes, the words you recognised on the page will not come back on their own.
Close the book and ask yourself: what did that say? Try to bring it back from memory. You will get some of it wrong. That is fine — the trying is the part that works.
Every time you pull something out of your memory, you make the path to it easier to find next time. Reading it again just lays it on top. Pulling it out digs a groove.
This will feel harder than highlighting. The hard feeling is the learning happening. Highlighting feels easy because nothing is happening.
These articles summarize well-established research in learning science and linguistics. Key sources and further reading:
The question assumes focus is a muscle you train. The strongest evidence says the training barely carries over, and the...
No time, no talent, too old — those are explanations, not causes. What can be measured is duller: one sentence with a ti...
Not one event but four, running on clocks a billion-fold apart: a wave at 400 milliseconds, a word locked in overnight,...