How to Study Based on Memory Research
Main concepts: Retrieval practice, spacing, interleaving, and feedback. Key takeaway: learning lasts longer when you actively recall information over time instead of only rereading.
How to Study Based on Memory Research
Have you ever spent hours revising for a test, only to forget everything the moment you opened the exam paper? Or reread the same page so many times that it felt familiar, yet realised you couldn't actually explain what it meant?
Many students assume that studying for longer automatically leads to better results. Psychological research suggests otherwise. Our brains don't remember information simply because we've spent more time looking at it. Instead, the way we learn—how we process, retrieve, and revisit information—plays a much greater role in determining what we remember.
Understanding how memory works doesn't just explain why some study methods fail; it reveals why a few evidence-based strategies can often outperform hours of passive revision. By studying in ways that align with how the brain naturally learns, we can spend less time memorising and more time remembering.
The Psychology
Levels of Processing
Not all studying is equally effective. Reading the same page repeatedly may make the material feel familiar, but familiarity is not the same as remembering.
When we actively think about the meaning of information—by explaining it in our own words, connecting it to prior knowledge, or applying it to real-life situations—we process it more deeply. This creates stronger memory traces than simply recognising words on a page.²
Research Spotlight
Craik & Lockhart (1972): Levels of Processing
Fergus Craik and Robert Lockhart proposed that long-term memory depends on the depth of processing rather than the amount of time spent studying. Information processed semantically, by focusing on meaning, is remembered far better than information processed only at a superficial level. Understanding information leads to stronger memories than simply reading or memorising it.
Retrieval Practice
One of the most effective ways to strengthen memory is surprisingly simple: try to remember information without looking at your notes.
Every time you actively retrieve information—through practice questions, flashcards, or explaining a concept from memory—you strengthen the pathways that make future recall easier. Although this often feels more difficult than rereading, that difficulty reflects learning rather than failure.³
Research Spotlight
Roediger & Karpicke (2006): The Testing Effect
Henry Roediger III and Jeffrey Karpicke found that students who repeatedly tested themselves remembered information significantly better over time than those who spent the same amount of time rereading their notes. Testing yourself is not just a way to measure learning—it is one of the most effective ways to improve it.
Spaced Repetition
Many students revise the night before an exam, believing that longer study sessions lead to better results. However, memories become stronger when learning is spread across multiple shorter sessions over time.
Returning to information after some forgetting has occurred requires the brain to reconstruct the memory, strengthening it each time it is successfully retrieved.⁴
Research Spotlight
Ebbinghaus (1885): The Forgetting Curve
Hermann Ebbinghaus demonstrated that forgetting happens rapidly after learning, but reviewing information at spaced intervals dramatically slows this decline. Short, repeated study sessions are generally more effective than one long session immediately before an exam.
Interleaving
Rather than studying one topic for hours before moving on, research suggests that mixing related topics can improve learning.
For example, instead of completing twenty algebra questions followed by twenty geometry questions, alternating between the two forces the brain to identify which strategy should be used. Although interleaving often feels harder, it promotes deeper understanding and more flexible thinking.⁵
Research Spotlight
Rohrer & Taylor (2007): The Shuffling of Mathematics Problems
Doug Rohrer and Kelly Taylor found that students who practised mathematics using interleaved problem sets performed better on later tests than those who studied one topic at a time. Mixing topics encourages the brain to discriminate between concepts rather than relying on repetition alone.
Putting the Psychology Together
Effective studying is not determined by how long we study but by how we interact with the material. Deep processing helps information enter long-term memory, retrieval practice strengthens recall, spaced repetition prevents rapid forgetting, and interleaving improves understanding across different contexts.²³⁴⁵
Although these strategies often feel more challenging than passive revision, that challenge is precisely what makes them effective. By studying in ways that align with how memory naturally works, students can spend less time rereading information and more time building knowledge that lasts beyond the next exam.
The Psychology in Action
Most students want to study effectively, but many unknowingly rely on strategies that feel productive rather than those that actually improve long-term memory. Looking at everyday study habits helps explain why some methods produce lasting learning while others create only a temporary sense of familiarity.
"I've Read This Five Times."
The night before a biology test, you read the same chapter repeatedly. By the final read-through, everything feels familiar, and you're convinced you've learnt it.
The next morning, however, you struggle to recall key concepts without looking at your notes.
Although rereading increases familiarity, it doesn't necessarily strengthen memory. Without actively thinking about the material or retrieving it from memory, much of the information is quickly forgotten.
"I Knew It Yesterday."
You spend three hours revising for a history exam the night before the test. Everything seems clear, and you leave your desk feeling confident.
A week later, you can barely remember what you studied.
This is a common consequence of cramming. While studying intensively in one session may improve short-term performance, memories are much more likely to last when learning is spread across multiple sessions over time.
"The Quiz Was Harder Than Reading My Notes."
Instead of rereading your textbook, your teacher gives a short practice quiz without allowing you to look at your notes.
At first, it feels frustrating because you can't remember every answer. After checking your mistakes and trying again later, you realise that the information is becoming easier to recall.
Although self-testing often feels more difficult than rereading, actively retrieving information strengthens memory far more effectively than simply recognising it on a page.
The Common Pattern
Whether you're rereading notes, cramming the night before an exam, or testing yourself with practice questions, the same psychological principles are at work. Lasting learning depends on actively engaging with information, revisiting it over time, and repeatedly retrieving it from memory. The most effective study strategies often feel more challenging in the moment, but that challenge is exactly what helps knowledge stay with us long after the exam has ended.
Putting Psychology into Practice
Effective studying isn't about spending the most hours with your books open—it's about using strategies that strengthen long-term memory. Psychological research consistently shows that active learning produces better results than passive revision. By making a few changes to the way you study, you can improve both your understanding and your ability to remember information long after the exam is over.
1. Explain the Concept in Your Own Words
After learning a new topic, close your notes and try explaining it as if you were teaching a friend. If you struggle to explain part of it, you've identified exactly what you need to review.
Psychology Behind It
Explaining information requires deep processing, helping you focus on meaning rather than simply recognising familiar words. This creates stronger and more durable memories.²
2. Test Yourself Before Looking at Your Notes
Before rereading a chapter or your class notes, try writing down everything you can remember first. Then compare your answers with your notes to identify what you've forgotten.
Although this often feels more difficult than rereading, it strengthens memory far more effectively.
Psychology Behind It
Retrieval practice actively strengthens memory by requiring your brain to reconstruct information, making future recall easier.³
3. Study a Little, but More Often
Instead of revising for four hours the night before an exam, spread your studying across shorter sessions over several days or weeks.
Returning to material after a short break forces your brain to retrieve information again, reinforcing learning each time.
Psychology Behind It
Spaced repetition slows forgetting and strengthens long-term retention far more effectively than cramming.⁴
4. Mix Different Topics Together
Rather than studying one chapter until you feel you've mastered it, alternate between related topics or subjects.
For example, if you're studying mathematics, switch between algebra, geometry, and statistics instead of completing twenty questions on the same topic.
Psychology Behind It
Interleaving encourages your brain to recognise which strategy or concept should be applied, improving flexible thinking and long-term understanding.⁵
5. Focus on Learning, Not Familiarity
It's easy to mistake familiarity for understanding. Highlighted pages, neatly organised notes, and repeated reading can make material feel easy without improving your ability to remember it.
Instead of asking yourself, "Does this look familiar?", ask:
Can I explain this without my notes?
Could I answer an exam question on this topic?
Can I apply this idea to a new situation?
These questions reveal whether you've truly learnt the material.
Psychology Behind It
Effective learning depends on successful retrieval and meaningful understanding, not simply recognising information you've seen before.²³
References
Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux.
Craik, F. I. M., & Lockhart, R. S. (1972). Levels of Processing: A Framework for Memory Research. Journal of Verbal Learning and Verbal Behavior, 11(6), 671–684.
Roediger, H. L., III, & Karpicke, J. D. (2006). Test-Enhanced Learning: Taking Memory Tests Improves Long-Term Retention. Psychological Science, 17(3), 249–255.
Ebbinghaus, H. (1885/1913). Memory: A Contribution to Experimental Psychology.
Rohrer, D., & Taylor, K. (2007). The Shuffling of Mathematics Problems Improves Learning. Instructional Science, 35(6), 481–498.
How to Study Based on Memory Research
Have you ever spent hours revising for a test, only to forget everything the moment you opened the exam paper? Or reread the same page so many times that it felt familiar, yet realised you couldn't actually explain what it meant?
Many students assume that studying for longer automatically leads to better results. Psychological research suggests otherwise. Our brains don't remember information simply because we've spent more time looking at it. Instead, the way we learn—how we process, retrieve, and revisit information—plays a much greater role in determining what we remember.
Understanding how memory works doesn't just explain why some study methods fail; it reveals why a few evidence-based strategies can often outperform hours of passive revision. By studying in ways that align with how the brain naturally learns, we can spend less time memorising and more time remembering.
The Psychology
Levels of Processing
Not all studying is equally effective. Reading the same page repeatedly may make the material feel familiar, but familiarity is not the same as remembering.
When we actively think about the meaning of information—by explaining it in our own words, connecting it to prior knowledge, or applying it to real-life situations—we process it more deeply. This creates stronger memory traces than simply recognising words on a page.²
Research Spotlight
Craik & Lockhart (1972): Levels of Processing
Fergus Craik and Robert Lockhart proposed that long-term memory depends on the depth of processing rather than the amount of time spent studying. Information processed semantically, by focusing on meaning, is remembered far better than information processed only at a superficial level. Understanding information leads to stronger memories than simply reading or memorising it.
Retrieval Practice
One of the most effective ways to strengthen memory is surprisingly simple: try to remember information without looking at your notes.
Every time you actively retrieve information—through practice questions, flashcards, or explaining a concept from memory—you strengthen the pathways that make future recall easier. Although this often feels more difficult than rereading, that difficulty reflects learning rather than failure.³
Research Spotlight
Roediger & Karpicke (2006): The Testing Effect
Henry Roediger III and Jeffrey Karpicke found that students who repeatedly tested themselves remembered information significantly better over time than those who spent the same amount of time rereading their notes. Testing yourself is not just a way to measure learning—it is one of the most effective ways to improve it.
Spaced Repetition
Many students revise the night before an exam, believing that longer study sessions lead to better results. However, memories become stronger when learning is spread across multiple shorter sessions over time.
Returning to information after some forgetting has occurred requires the brain to reconstruct the memory, strengthening it each time it is successfully retrieved.⁴
Research Spotlight
Ebbinghaus (1885): The Forgetting Curve
Hermann Ebbinghaus demonstrated that forgetting happens rapidly after learning, but reviewing information at spaced intervals dramatically slows this decline. Short, repeated study sessions are generally more effective than one long session immediately before an exam.
Interleaving
Rather than studying one topic for hours before moving on, research suggests that mixing related topics can improve learning.
For example, instead of completing twenty algebra questions followed by twenty geometry questions, alternating between the two forces the brain to identify which strategy should be used. Although interleaving often feels harder, it promotes deeper understanding and more flexible thinking.⁵
Research Spotlight
Rohrer & Taylor (2007): The Shuffling of Mathematics Problems
Doug Rohrer and Kelly Taylor found that students who practised mathematics using interleaved problem sets performed better on later tests than those who studied one topic at a time. Mixing topics encourages the brain to discriminate between concepts rather than relying on repetition alone.
Putting the Psychology Together
Effective studying is not determined by how long we study but by how we interact with the material. Deep processing helps information enter long-term memory, retrieval practice strengthens recall, spaced repetition prevents rapid forgetting, and interleaving improves understanding across different contexts.²³⁴⁵
Although these strategies often feel more challenging than passive revision, that challenge is precisely what makes them effective. By studying in ways that align with how memory naturally works, students can spend less time rereading information and more time building knowledge that lasts beyond the next exam.
The Psychology in Action
Most students want to study effectively, but many unknowingly rely on strategies that feel productive rather than those that actually improve long-term memory. Looking at everyday study habits helps explain why some methods produce lasting learning while others create only a temporary sense of familiarity.
"I've Read This Five Times."
The night before a biology test, you read the same chapter repeatedly. By the final read-through, everything feels familiar, and you're convinced you've learnt it.
The next morning, however, you struggle to recall key concepts without looking at your notes.
Although rereading increases familiarity, it doesn't necessarily strengthen memory. Without actively thinking about the material or retrieving it from memory, much of the information is quickly forgotten.
"I Knew It Yesterday."
You spend three hours revising for a history exam the night before the test. Everything seems clear, and you leave your desk feeling confident.
A week later, you can barely remember what you studied.
This is a common consequence of cramming. While studying intensively in one session may improve short-term performance, memories are much more likely to last when learning is spread across multiple sessions over time.
"The Quiz Was Harder Than Reading My Notes."
Instead of rereading your textbook, your teacher gives a short practice quiz without allowing you to look at your notes.
At first, it feels frustrating because you can't remember every answer. After checking your mistakes and trying again later, you realise that the information is becoming easier to recall.
Although self-testing often feels more difficult than rereading, actively retrieving information strengthens memory far more effectively than simply recognising it on a page.
The Common Pattern
Whether you're rereading notes, cramming the night before an exam, or testing yourself with practice questions, the same psychological principles are at work. Lasting learning depends on actively engaging with information, revisiting it over time, and repeatedly retrieving it from memory. The most effective study strategies often feel more challenging in the moment, but that challenge is exactly what helps knowledge stay with us long after the exam has ended.
Putting Psychology into Practice
Effective studying isn't about spending the most hours with your books open—it's about using strategies that strengthen long-term memory. Psychological research consistently shows that active learning produces better results than passive revision. By making a few changes to the way you study, you can improve both your understanding and your ability to remember information long after the exam is over.
1. Explain the Concept in Your Own Words
After learning a new topic, close your notes and try explaining it as if you were teaching a friend. If you struggle to explain part of it, you've identified exactly what you need to review.
Psychology Behind It
Explaining information requires deep processing, helping you focus on meaning rather than simply recognising familiar words. This creates stronger and more durable memories.²
2. Test Yourself Before Looking at Your Notes
Before rereading a chapter or your class notes, try writing down everything you can remember first. Then compare your answers with your notes to identify what you've forgotten.
Although this often feels more difficult than rereading, it strengthens memory far more effectively.
Psychology Behind It
Retrieval practice actively strengthens memory by requiring your brain to reconstruct information, making future recall easier.³
3. Study a Little, but More Often
Instead of revising for four hours the night before an exam, spread your studying across shorter sessions over several days or weeks.
Returning to material after a short break forces your brain to retrieve information again, reinforcing learning each time.
Psychology Behind It
Spaced repetition slows forgetting and strengthens long-term retention far more effectively than cramming.⁴
4. Mix Different Topics Together
Rather than studying one chapter until you feel you've mastered it, alternate between related topics or subjects.
For example, if you're studying mathematics, switch between algebra, geometry, and statistics instead of completing twenty questions on the same topic.
Psychology Behind It
Interleaving encourages your brain to recognise which strategy or concept should be applied, improving flexible thinking and long-term understanding.⁵
5. Focus on Learning, Not Familiarity
It's easy to mistake familiarity for understanding. Highlighted pages, neatly organised notes, and repeated reading can make material feel easy without improving your ability to remember it.
Instead of asking yourself, "Does this look familiar?", ask:
Can I explain this without my notes?
Could I answer an exam question on this topic?
Can I apply this idea to a new situation?
These questions reveal whether you've truly learnt the material.
Psychology Behind It
Effective learning depends on successful retrieval and meaningful understanding, not simply recognising information you've seen before.²³
References
Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux.
Craik, F. I. M., & Lockhart, R. S. (1972). Levels of Processing: A Framework for Memory Research. Journal of Verbal Learning and Verbal Behavior, 11(6), 671–684.
Roediger, H. L., III, & Karpicke, J. D. (2006). Test-Enhanced Learning: Taking Memory Tests Improves Long-Term Retention. Psychological Science, 17(3), 249–255.
Ebbinghaus, H. (1885/1913). Memory: A Contribution to Experimental Psychology.
Rohrer, D., & Taylor, K. (2007). The Shuffling of Mathematics Problems Improves Learning. Instructional Science, 35(6), 481–498.