Methods · Evidence
Ten techniques, rated by evidence, not popularity.
Cognitive and educational psychologists have spent decades testing which study habits actually change what you can recall weeks later. Two come out clearly ahead. Several popular habits — rereading, highlighting, and matching lessons to a "learning style" — do not hold up. This page rates each technique using the strength-of-evidence language from the field's own landmark review, not an invented score.
Ratings use Dunlosky et al.'s (2013) own "High / Moderate / Low utility" categories — not an invented effect-size number. See Sources.
01 — The Ledger
What holds up, and what doesn't.
Sort by evidence strength to see the two clear winners first, or search for a technique you already use.
| Practice testing (retrieval practice) | Closing the book and pulling the answer from memory — flashcards, self-quizzing, blank-page recall — before checking. | High utility | Every session, on material you've already met once. Do it before you feel ready, not after. | Rereading notes and calling it "reviewing," then treating recognition ("yes, that looks familiar") as proof of recall. |
| Distributed practice (spacing) | Splitting study of the same material across several sessions with gaps between them, instead of one long block. | High utility | Anything you need to still know in weeks or months — cumulative subjects, board and entrance exams. | Cramming the night before: it can prop up tomorrow's test but loses badly on what you retain a month later. |
| Interleaved practice | Mixing different topics or problem types within one session instead of finishing one before starting the next. | Moderate utility | Once you can solve each type alone — interleaving is for practising when to use a method, not learning the method itself. | Interleaving before the basics are solid, which mostly adds confusion instead of useful difficulty. |
| Elaborative interrogation | Asking yourself "why is this true?" or "why does this make sense?" for each fact, and answering it. | Moderate utility | Fact-heavy material (history dates, biology terms) where isolated facts need connecting to what you already know. | Accepting a vague or circular "why" answer instead of pushing for a real explanation. |
| Self-explanation | Explaining each step of a text, worked example or problem to yourself as you go, in your own words. | Moderate utility | Worked examples in maths and science, and dense conceptual passages. | Silently nodding along without producing the explanation out loud or in writing. |
| Summarization | Writing a condensed summary of a text in your own words after reading it. | Low utility | As a comprehension check, not a primary memory strategy — pair it with retrieval practice. | Copying phrases from the source rather than genuinely reconstructing the ideas. |
| Highlighting & underlining | Marking passages in a text while reading, usually to flag what seems important. | Low utility | Fine as a first pass to locate material — never treat it as the study step itself. | Mistaking a heavily marked-up page for material that's actually been learned. |
| Keyword mnemonic | Linking a new word or fact to a familiar-sounding word plus a vivid mental image. | Low utility | Short-term recall of isolated items (vocabulary lists) — it fades faster for durable, transferable understanding. | Relying on it for concepts that need to be understood and applied, not just recalled as a label. |
| Imagery for text (a form of dual coding) | Forming a mental picture of what a sentence or passage describes while reading it. | Low utility | Results were inconsistent across ages and materials in the reviewed studies — treat it as a minor aid, not a core strategy, for plain text. | Confusing "picturing it in your head while reading" (weak evidence) with pairing real diagrams or worked visuals alongside words (a separate question this review didn't rate the same way). |
| Rereading | Reading the same material a second or third time. | Low utility | A quick first-pass orientation to new material, immediately followed by retrieval practice — not as the review itself. | The single most common study habit, precisely because it feels productive while adding little beyond the second read. |
10 techniques · tap any column to sort · ratings follow Dunlosky, Rawson, Marsh, Nathan & Willingham (2013) — see Sources.
02 — A Popular Myth
"Learning styles" isn't on the ledger — on purpose.
"Learning styles" — the idea that each person learns best through a fixed preferred channel (visual, auditory, kinaesthetic) and that matching teaching to that channel improves learning — is not a rated technique here because it isn't a technique at all. It's a claim about how learning works, and the claim has been tested directly.
Pashler, McDaniel, Rohrer & Bjork's 2008 review in Psychological Science in the Public Interest looked specifically for studies with the design the theory requires: learners identified by their preferred style, then randomly taught in a matching or mismatching way, then compared on the same test. Almost no published research used that design — and the handful that did found no advantage from matching. Their conclusion, quoted directly: "at present, there is no adequate evidence base to justify incorporating learning-styles assessments into general educational practice."
This doesn't mean preferences don't exist, or that variety in how material is presented is bad — diagrams, discussion and hands-on work are all worth using. It means there is no evidence that sorting learners into a "style" and matching instruction to it improves outcomes. Spend that effort on the two techniques rated High utility in the ledger above instead.
03 — Common Questions
Before you change how you study.
Is highlighting completely useless?
Not useless, but low-yield: Dunlosky et al. (2013) rated highlighting and underlining low utility because, on their own, they rarely improve performance on later tests beyond simply reading the material. It isn't harmful — it just shouldn't be your main strategy.
Why do "learning styles" persist if the evidence doesn't support them?
The idea is intuitive and flattering — everyone feels they have a preferred way of taking in information. But Pashler, McDaniel, Rohrer & Bjork's 2008 review found no adequate evidence that matching teaching to a person's preferred "style" improves learning outcomes. Popularity outran the evidence.
Does cramming ever work?
For a test tomorrow, short-term recall can hold up reasonably well. The cost shows up later: Cepeda et al. (2006) found spaced practice reliably beats massed practice (cramming) for what you can still recall weeks or months on — which is what actually matters for cumulative subjects and board exams.
What is a "desirable difficulty"?
A term from the psychologist Robert Bjork's research programme describing strategies that feel harder in the moment — retrieval, spacing, interleaving — but produce more durable learning than strategies that feel easy, like rereading. The discomfort is often a sign the technique is working, not that it's failing.
Do I need to use all ten techniques?
No. Start with the two rated High utility — practice testing and distributed practice — since they carry the strongest evidence for the least added complexity. Layer in interleaving and elaborative interrogation as the material allows.
04 — Sources
Where these ratings come from
- Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). "Improving Students' Learning With Effective Learning Techniques: Promising Directions From Cognitive and Educational Psychology." Psychological Science in the Public Interest, 14(1), 4–58.journals.sagepub.com · DOI 10.1177/1529100612453266 · accessed 26 Jul 2026
- Roediger, H. L., & Karpicke, J. D. (2006). "Test-Enhanced Learning: Taking Memory Tests Improves Long-Term Retention." Psychological Science, 17(3), 249–255.DOI 10.1111/j.1467-9280.2006.01693.x · accessed 26 Jul 2026
- 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.DOI 10.1037/0033-2909.132.3.354 · PMID 16719566 · accessed 26 Jul 2026
- Pashler, H., McDaniel, M., Rohrer, D., & Bjork, R. (2008). "Learning Styles: Concepts and Evidence." Psychological Science in the Public Interest, 9(3), 105–119.journals.sagepub.com · accessed 26 Jul 2026
Method: the strength-of-evidence rating for each of the ten ledger techniques is taken directly from Dunlosky et al.'s (2013) own three-tier "utility" classification (High / Moderate / Low) — no effect-size number is invented here that the source paper itself didn't publish as a headline rating. The imagery/dual-coding row is worded carefully because the same paper's "Low utility" finding was specifically about generating mental imagery while reading plain text — a narrower claim than "diagrams never help," which this page does not attempt to rate. The learning-styles section quotes Pashler et al. (2008) directly rather than paraphrasing its conclusion.
Key terms for this topic
Generated on request by this site’s AI from the topic below — not a hand-written glossary. Useful for orientation; check anything you intend to rely on.