Active Recall vs Rereading: What the Studies Actually Show
In the active recall vs rereading debate, the research is not close: testing yourself beats reading your notes again for anything you need to remember days or weeks later. Rereading can win on a quiz five minutes after you study, but by two days and one week later, students who practiced recall remembered noticeably more. The catch is that rereading feels better, which is why so many of us keep doing it.
If you keep rereading because writing your own questions takes forever, FlashDeck turns your notes into recall cards for you: Build my study plan.
Why rereading feels like studying
Rereading is comfortable. You open your notes, the words look familiar, and your brain says "yep, I know this." That feeling is called fluency, and it is sneaky. Recognizing something on a page is a lot easier than pulling it out of your head with the page closed, which is what a test asks you to do.
A few reasons rereading notes stays so popular:
- It never feels hard. No blank moments, no wrong answers.
- It looks productive. Pages turned, highlighter out, time logged.
- It builds confidence. Unfortunately, the confidence does not match the results (more on that below).
So is rereading effective? It is not useless, but it is one of the weakest ways to spend study time, and it hides the gaps you most need to find.
What active recall is in one sentence
Here is the active recall meaning in plain words: active recall is closing the book and trying to bring an answer back from memory before you check it.
That is the whole definition. Flashcards, practice questions, "blurting" everything you remember onto a blank page and explaining a topic out loud are all active recall examples. Researchers usually call it retrieval practice or the testing effect. If you want the full story on those names, see Is Active Recall the Same as Retrieval Practice?.
Active recall definition in reading
When people search for the active recall definition in reading, they usually mean this: after each section of a textbook, you look away and say or write what you just read before moving on. That small pause turns passive reading into an active recall reading technique. We walk through it page by page in How to Active Recall While Reading a Textbook.
What the research found (with sources)
A lot of study blogs repeat a line like "active recall is 50% better than rereading" without a source. Here is what the actual studies say.
Roediger & Karpicke, 2006: rereading wins early, recall wins later
Students read short passages. Some reread them; others read once and then took a recall test. On a test five minutes later, the rereading group did slightly better (about 81% vs 75% recalled). But two days later and one week later, the tested group was clearly ahead. At one week, it was roughly 56% for the tested group vs 42% for the rereaders (Roediger & Karpicke, 2006).
The twist: the students who only reread predicted they would remember more. Their confidence ran the wrong way.
Karpicke & Roediger, 2008: retrieval is what makes it stick
Students learned foreign-language word pairs. Once they had gotten an item right, some kept being tested on it and some only kept studying it. A week later, students who kept retrieving remembered about 80% of the pairs. When items were dropped from testing, recall fell to around a third, even when those items were still being restudied (Karpicke & Roediger, 2008).
Extra rereading of items you already "know" added almost nothing. Extra retrieval added a lot.
Dunlosky et al., 2013: the big review
A team of psychologists rated ten common study techniques. Practice testing and distributed (spaced) practice got the only "high utility" ratings. Rereading and highlighting were rated "low utility" (Dunlosky et al., 2013).
Side-by-side: effort, time, results
Here is rereading vs active recall, and active recall vs passive reading in general, in one table.
| Rereading / passive reading | Active recall | |
|---|---|---|
| How it feels | Easy, familiar | Harder, sometimes frustrating |
| What it trains | Recognizing the page | Producing the answer from memory |
| Shows your gaps? | Rarely | Every time you miss |
| Result 5 minutes later | Slightly better | Slightly worse |
| Result days or weeks later | Weaker | Stronger |
| Research rating | Low utility (Dunlosky 2013) | High utility (Dunlosky 2013) |
| Time per chapter | Often hours | Minutes a day once cards exist |
The "hard" feeling on the right-hand side is not a bug. If it wears you out, Why Is Active Recall So Tiring? explains why and how to make it lighter.
When rereading still has a job
Rereading vs active recall is not all-or-nothing. Reading still matters in a few spots:
- First exposure. You cannot recall what you never took in. Read carefully once, and make sure you understand it.
- After a miss. When you get a question wrong, going back to the source to fix it is exactly the right move.
- Big-picture scanning. A quick skim of a chapter's headings before a recall session can help you organize what you are about to test.
What rereading should not be is the main event. One careful read, then switch to questions.
A 10-minute daily swap plan
Here is the best way to do active recall if you are coming from a rereading habit. Swap, don't add.
Step 1: Turn today's notes into questions (first time only)
Take one lecture or one textbook section. For every fact, definition or formula, write a question on one side and the answer on the other. "What does the mitochondria do?" beats "Mitochondria notes."
Step 2: Close everything and answer
Go through your questions with the notes closed. Say or write the answer before you flip. No peeking, no "I kind of knew that."
Step 3: Sort honestly
- Knew it: you produced the answer fully and quickly.
- Missed it: anything less.
Step 4: Space it out
Bring back what you knew in a day, then three days, then a week, then longer. Bring back misses tomorrow.
Step 5: Keep it to about ten minutes
Ten focused minutes a day beats a two-hour Sunday reread.
The hard part is step 4. Keeping track of which card is due on which day, for every class, is where most students quietly give up and go back to rereading. FlashDeck does that part: paste your notes or upload slides as a PDF, it writes one card per fact, definition or formula from only what you pasted, and each day it shows only the cards that are due. Tap Knew it and the card waits a day, then three days, then a week; tap Missed it and it comes back tomorrow. Build my study plan
Active recall tips for students making the switch
- Start with one class, not all of them.
- Write questions in your own words, but keep them tied to what your teacher actually covered.
- Expect to miss a lot at first. Misses are where the learning happens.
- Do it at the same time every day: the bus, before practice, after dinner.
Stop rereading tonight and start recalling
The honest answer to active recall vs rereading is that you can switch in one evening. Paste one set of notes, get your cards, and your first review takes about ten minutes. From tomorrow, you only see what is due.
FAQ
Is active recall better than rereading?
For remembering things days or weeks later, yes. In Roediger & Karpicke's 2006 study, rereading won slightly on a test five minutes later, but students who practiced recall remembered more two days and one week later. A major 2013 review rated practice testing "high utility" and rereading "low utility."
What is active recall, and what is it not?
Active recall is trying to produce an answer from memory before you look at it. Rereading, highlighting and copying notes are not active recall, because the answer is in front of you the whole time. Flashcards, practice questions and blurting all count.
How do you use active recall in study sessions with a textbook?
Read one section, close the book, and write or say the key points before moving on. Then check what you missed and turn those misses into questions you will answer again tomorrow. Our guide on active recall while reading has a full page-by-page routine.
Is active recall vs passive reading a waste of time for easy classes?
Even in easy classes, active recall usually saves time, because you stop rereading things you already know. You spend your minutes only on the material you actually miss.
What is the best way to do active recall every day?
Keep it short and scheduled: about ten minutes of answering questions that are due, with the ones you knew spaced further out and the ones you missed back tomorrow. FlashDeck handles that schedule automatically once you paste your notes, so you just answer the cards it shows you.