The science of studying: test yourself after each chapter, flashcards, Pomodoro and a tidy desk

Most of us study the way that feels productive: rewatching, rereading and highlighting. Decades of memory research say those feel good but do little. What works is less comfortable: pulling the answer out of your own head, spreading practice out over days, and working in focused blocks without distractions. This page explains the main findings in plain words, with the studies behind them, and how Studyio builds them into every course.

What works and what doesn't

In 2013, a team of psychologists led by John Dunlosky reviewed hundreds of studies on ten popular study techniques. Two came out on top as "high utility": practice testing (quizzing yourself) and distributed practice (spreading study out over time). Rereading, highlighting and summarising were rated "low utility": they help a little, mostly in the short term. The rest of this page is about doing the two that work.

Test yourself after each chapter

Psychologists call it the testing effect or retrieval practice: recalling something strengthens the memory far more than seeing it again. In a well-known experiment, Henry Roediger and Jeffrey Karpicke (2006) had students read a passage and then either reread it or take a recall test. Five minutes later the rereaders did slightly better. Two days and one week later the tested group remembered clearly more, even though they had spent less time looking at the text.

It also beats more effortful studying. Karpicke and Blunt (2011) found that students who practised recalling a science text learned more than students who built detailed concept maps of it, including on questions that asked them to draw conclusions rather than repeat facts.

Testing matters even more for video. Szpunar, Khan and Schacter (2013) showed students a recorded lecture. Those who answered short tests between its segments let their minds wander about half as often, took more notes and did better on the final test than students who watched the same lecture straight through. A long video with no checkpoints is exactly where attention drifts.

Three details make a quiz work better:

• Do it straight after the chapter, while you can still fix what you missed, and again later (see spacing below).
• Get feedback. Multiple-choice questions can leave you remembering a wrong option. Butler and Roediger (2008) found that seeing the correct answer after each question removed that risk and increased what students kept.
• Go back to the source. A wrong answer is most useful when you rewatch the exact part of the lesson that explains it.

On Studyio, every chapter ends with a short quiz. Each answer comes with an explanation and a link to the moment in the video that covers it, and a retake asks the questions you haven't answered yet before repeating any.

Space it out instead of cramming

The spacing effect is one of the oldest findings in psychology, first described by Hermann Ebbinghaus in 1885. Studying the same material in several sessions spread over days beats one long session of the same total length. A large review of more than 300 experiments by Cepeda and colleagues (2006) confirmed it across ages and subjects. Cramming can get you through tomorrow's test, but it fades fast.

The forgetting in between is part of why it works: having to work a little to remember something makes the memory stronger. That is why revising last week's chapter, when it already feels a bit hazy, is worth more than going over today's again.

Studyio brings old material back for you. The dashboard's Quick Quiz and flashcards come from chapters you watched earlier, and questions you got wrong come back more often. When you return to a course after a break, a short refresher asks a few questions from what you watched before you carry on.

What are flashcards for?

A flashcard is a tiny test: a question or term on the front, the answer on the back. Its job is to make you recall the answer before you see it, which is retrieval practice in its simplest form. Flashcards are best for things you need to know cold: definitions, formulas, keywords, syntax, dates, and the small facts that longer problems are built on. They are not a replacement for working through problems or understanding a chapter, but they keep its building blocks fresh.

How to use them well:

• Answer before you flip. Say or think the answer first. Flipping straight away turns the card back into rereading.
• Use one big deck, spread out. Nate Kornell (2009) compared studying one large stack of cards spread out with studying small stacks one at a time. The spread-out stack worked better for 90% of the students, yet most of them believed the small stacks had worked better. Spacing feels harder, which is why it gets mistaken for not working.
• Don't retire a card too soon. Setting aside cards you know saves time, but Kornell and Bjork (2008) found students tend to drop them after getting them right once, before the memory is solid.

Studyio makes flashcards for every chapter. Mark a card Review later and it comes back more often; mark it Got it and it steps aside. When you want a full revision, you can bring all your known cards back with one click.

What is a Pomodoro?

The Pomodoro Technique was created by Francesco Cirillo in the late 1980s and named after the tomato-shaped kitchen timer he used as a student (pomodoro is Italian for tomato). The classic version is simple:

1. Pick one task.
2. Work on it for 25 minutes without switching to anything else.
3. Take a 5-minute break away from the screen.
4. After four rounds, take a longer break of 15 to 30 minutes.

To be honest about the evidence: there is little research on the exact 25-minute number, and the right length differs from person to person and subject to subject. What the technique gets right is backed by research on attention. Focus on one task slips over long stretches, and Ariga and Lleras (2011) found that brief, planned breaks from a task kept performance steady where people who worked straight through got worse. A timer also makes starting easier: 25 minutes feels manageable when "study for the evening" doesn't. And the rule of one task per block protects you from switching, which costs time and accuracy every time you do it.

Studyio's focus timer is a Pomodoro built into the lesson. You choose the study and break lengths and press Start Pomodoro. It counts while you're on the lesson, waits while you answer a quiz, and when it's time for a break it pauses the video and picks up a few seconds back when you return, so you don't lose the thread.

A neat workspace helps you focus

Attention is limited, and anything in view competes for it. Brain imaging by McMains and Kastner (2011) showed that several objects in view compete for the brain's processing, so a cluttered scene makes it harder to focus on the one thing you want. A clear desk and a clear screen leave more of that capacity for the lesson.

Screens are the biggest source of clutter. In a classroom study, Sana, Weston and Cepeda (2013) found that students who multitasked on a laptop during a lecture understood less of it, and so did the students sitting near them who could see their screens. Ward and colleagues (2017) reported that just having your phone on the desk, even switched off, lowered performance on tests of working memory, even when it was face down and silent; later studies have found this effect smaller, but putting the phone in another room costs nothing.

A simple setup for a study session:

• Phone in another room, or at least out of sight and on silent.
• One window: the lesson and your notes. Close the other tabs.
• Water and anything you need within reach, so you don't get up mid-chapter.
• Notes in your own words, with timestamps so you can jump back to any moment.

YouTube's sidebar, comments and autoplay are built to pull you to the next video (more on that in YouTube's algorithm isn't built for studying). Studyio's lesson page has none of them: the video, your notes and the course. Focus Mode goes further and leaves only the video on screen, with your notes one key away.

Putting it together: one chapter, step by step

1. Clear your desk, put the phone away and start a Pomodoro.
2. Watch the chapter, pausing to write the key ideas in your own words, with timestamps.
3. Take the quiz at the end without looking at your notes. Read every explanation, and rewatch the parts you got wrong.
4. Take your break away from the screen when the timer says so.
5. Tomorrow, before the next chapter, answer a few questions or flashcards from earlier chapters.

Studyio does the planning parts for you: chapters with progress, the quiz after each one, flashcards and questions from earlier chapters, the timer and a distraction-free lesson page. See how it works, or turn any YouTube playlist into a course.

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References

• Ariga, A., & Lleras, A. (2011). Brief and rare mental "breaks" keep you focused: Deactivation and reactivation of task goals preempt vigilance decrements. Cognition, 118(3), 439–443.
• Butler, A. C., & Roediger, H. L. (2008). Feedback enhances the positive effects and reduces the negative effects of multiple-choice testing. Memory & Cognition, 36(3), 604–616.
• Cepeda, N. J., Pashler, H., Vul, E., Wixted, J. T., & Rohrer, D. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354–380.
• Cirillo, F. (2018). The Pomodoro Technique. Currency.
• Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). Improving students' learning with effective learning techniques. Psychological Science in the Public Interest, 14(1), 4–58.
• Ebbinghaus, H. (1885). Über das Gedächtnis [Memory: A contribution to experimental psychology].
• Karpicke, J. D., & Blunt, J. R. (2011). Retrieval practice produces more learning than elaborative studying with concept mapping. Science, 331(6018), 772–775.
• Kornell, N. (2009). Optimising learning using flashcards: Spacing is more effective than cramming. Applied Cognitive Psychology, 23(9), 1297–1317.
• Kornell, N., & Bjork, R. A. (2008). Optimising self-regulated study: The benefits—and costs—of dropping flashcards. Memory, 16(2), 125–136.
• McMains, S., & Kastner, S. (2011). Interactions of top-down and bottom-up mechanisms in human visual cortex. Journal of Neuroscience, 31(2), 587–597.
• Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning: Taking memory tests improves long-term retention. Psychological Science, 17(3), 249–255.
• Sana, F., Weston, T., & Cepeda, N. J. (2013). Laptop multitasking hinders classroom learning for both users and nearby peers. Computers & Education, 62, 24–31.
• Szpunar, K. K., Khan, N. Y., & Schacter, D. L. (2013). Interpolated memory tests reduce mind wandering and improve learning of online lectures. Proceedings of the National Academy of Sciences, 110(16), 6313–6317.
• Ward, A. F., Duke, K., Gneezy, A., & Bos, M. W. (2017). Brain drain: The mere presence of one's own smartphone reduces available cognitive capacity. Journal of the Association for Consumer Research, 2(2), 140–154.