Study methods

On the evidence

Educational research is difficult to do well. Studies are often short, conducted with undergraduate volunteers, and measure recall of material that nobody cares about. Findings that hold in a laboratory sometimes weaken in a real classroom, where learners are tired, motivated by grades, and studying subjects with structure that nonsense syllables lack.

We have tried to be careful about this. Where we describe a method as well supported, we mean the finding has been replicated across multiple laboratories, age groups and subject areas. Where support is thinner, the article says so. Two of the six methods below — active recall and spaced repetition — are among the most robustly supported findings in the field. The other four are sensible, widely used, and rest on more modest evidence.

Active recall

Also called: retrieval practice, the testing effect · Evidence: strong

Active recall means deliberately retrieving information from memory rather than reviewing it in front of you. The act of retrieval is not a neutral measurement of what you know; it changes what you know, strengthening the pathway you just used.

How to do it

1. Study a section of material once, at normal pace.
2. Close everything. Take a blank page.
3. Write everything you can remember. Do not stop at the first blank; sit with it for a moment before moving on.
4. Open the material and compare. Mark what you missed in a different colour.
5. Study only the marked gaps, then repeat the blank page a day later.

Questions work as well as blank pages and suit some material better: cover the answers on a problem set, turn headings into questions, or ask a study partner to quiz you without warning.

What the research supports

The testing effect is among the most replicated findings in cognitive psychology. Roediger and Karpicke’s influential 2006 experiments found that learners who studied a passage once and then took repeated recall tests outperformed learners who re-read the passage repeatedly, when both groups were tested a week later — even though the re-reading group predicted they would do better. That mismatch between prediction and performance has itself been replicated many times.

Where it fails

Retrieval practice does not help much if you never learned the material in the first place; testing yourself on a chapter you have not read produces frustration, not learning. It also works poorly without feedback. If you never check your blank page against the source, you will confidently rehearse your errors.

Start this week

At the end of your next study session, spend five minutes writing what you remember before you close your notes. That is the whole intervention. Retrieval practice exercises are in the Practice Centre.

Spaced repetition

Also called: distributed practice, the spacing effect · Evidence: strong

Spaced repetition means separating your reviews in time rather than massing them together. The same total study time produces substantially better long-term retention when it is distributed across days or weeks instead of concentrated in one sitting.

How to do it

You do not need software. A calendar and a list will do. When you first learn a topic, give it three review dates:

If a review goes badly, shorten the next interval. If it goes easily, lengthen it. That single adjustment rule is what commercial flashcard software automates, and doing it by hand costs about ten minutes a week.

What the research supports

The spacing effect dates to Ebbinghaus in the 1880s and has held up across more than a century of study, including a substantial meta-analytic literature covering hundreds of experiments. It holds for facts, for procedures, for motor skills and across age groups. The optimal gap depends on how long you need to remember the material: longer retention intervals call for longer gaps.

Where it fails

Spacing conflicts with the way most courses are structured, and with how learning feels. Massed practice produces a smoother session and a stronger sense of mastery, which is why learners abandon spacing exactly when it starts working. It also requires planning ahead, so it is nearly useless as an emergency technique the week before an exam.

Start this week

Take last week’s topics. Write three dates beside each in your calendar. That is ten minutes of work and it removes the daily question of what to study. The review tracker gives you a grid for it.

Mind mapping

Also called: concept mapping, knowledge mapping · Evidence: moderate

A mind map places a central idea in the middle of a page and branches outwards into related concepts, with the relationships shown as labelled connections. It is a tool for seeing structure, which makes it most valuable for material where the structure is what you keep losing.

How to do it

1. Write the central concept in the middle of a landscape page.
2. Branch out to the three to six major sub-ideas. Resist adding more; if you need ten, two of them are probably the real branches.
3. Label every line with the relationship: causes, is a kind of, contradicts, measures. This is the step that converts a diagram into an argument.
4. Add cross-links between branches. These are usually where the insight is.
5. Redraw the map from memory a week later, then compare.

What the research supports

Meta-analyses of concept mapping generally find small to moderate positive effects on comprehension and retention compared with reading alone, with larger effects when learners construct maps themselves rather than studying maps made by someone else. The evidence is weaker than for retrieval practice, and much of the benefit may come from the elaboration involved rather than the visual format.

Where it fails

Mind mapping is a poor fit for sequential material such as procedures, proofs and chronologies, where a list or timeline is clearer. It also becomes an aesthetic project very easily; if you are choosing colours for forty minutes, you have stopped studying.

Start this week

Map one topic you keep confusing with another. The act of deciding where the boundary between them goes usually resolves the confusion.

Cornell notes

Developed at Cornell University in the 1950s · Evidence: moderate

The Cornell system divides a page into three regions and assigns each a job. Its value is not the layout itself but the fact that the layout forces a review step onto the same page as the notes, at the moment you are most likely to skip it.

How to do it

1. Rule the page: a cue column about one third of the width on the left, a notes area on the right, and a summary strip across the bottom five or six lines.
2. During the lecture or reading, write only in the notes area. Abbreviate freely; do not transcribe.
3. Within a day, fill the cue column with questions your notes answer — not keywords, questions.
4. Write the summary at the bottom in two or three sentences, from memory, then check.
5. To revise, cover the notes area and answer the cue questions.

What the research supports

Studies of the Cornell method report modest advantages over unstructured note-taking, most consistently for material that will be reviewed later. The evidence is not overwhelming and it is difficult to separate the format from the review behaviour it encourages. That may not matter much in practice: the review behaviour is the point, and the format is a reliable way of producing it.

Where it fails

The system needs a follow-up step within roughly a day. Cornell pages with an empty cue column are just ordinary notes with a wasted margin, and this is by far the most common way the method is used.

Start this week

Print the Cornell template and use it for every class for two weeks before deciding whether it suits you.

Goal setting

Evidence: moderate for performance goals; weaker for study-specific claims

The useful finding from goal-setting research is narrower than the popular version. Specific, moderately difficult goals tend to produce better performance than vague encouragement to do your best — but mainly for tasks where effort translates fairly directly into output, and mainly when feedback is available.

How to do it

Write goals as capabilities rather than activities. “Study chapter four” is an activity and can be completed without learning anything. “Can explain why the reaction is exothermic without notes” is a capability and can be checked.

Set goals at three horizons: the term, the week and the session. Each level should make the one above it slightly more likely, and the session goal should be small enough that a bad day does not destroy it.

Where it fails

Difficult goals improve performance on straightforward tasks and can impair it on complex ones, where the pressure to hit a target crowds out the exploration that learning needs. Goals set too far ahead also drift out of sight; the weekly horizon is where most of the useful work happens.

Start this week

Rewrite next week’s three study intentions as capability statements. If you cannot say how you would check one of them, it is not yet a goal.

Revision planning

Evidence: indirect — the components are well supported, the planning process less studied

Revision planning is where the other methods are assembled into a calendar. It is a scheduling exercise, and it works best done backwards from the assessment date rather than forwards from today.

How to do it

1. Inventory. Turn the syllabus into statements beginning “I can…”. Rate each from 1 (no idea) to 5 (could teach it).
2. Weight. Mark which topics carry the most marks. Low confidence plus high weight is where your time goes first.
3. Place the fixed points. The exam, then a final light review two days before, then full-condition practice about a week before.
4. Fill backwards. Assign first passes to the weakest high-weight topics, then reviews at expanding intervals.
5. Leave slack. One empty half-day per week. A plan with no slack fails on contact with the first illness or family emergency.
6. Re-rate weekly. Update the confidence numbers using what actually happened, not how you felt.

Where it fails

Planning is enjoyable and can substitute for studying. A revision timetable should take under an hour to build and under ten minutes a week to maintain. If yours has colour-coded sub-categories, you are procrastinating in an unusually organized way.

The second failure is abandonment. Almost every revision plan is behind schedule by week two. The correct response is to re-date the remaining items, not to declare the plan broken and revert to studying whatever feels most urgent.

Start this week

Use the six-week revision grid and the confidence checklist. Build the plan in one sitting, then stop.

Using them together

These methods are not alternatives. A functioning study routine usually contains most of them, doing different jobs:

Cornell notes capture

They produce a record with review built into its structure.

Mind maps organize

They show how the captured material fits together, which notes alone rarely make visible.

Active recall consolidates

It converts a record you have into knowledge you can reach.

Spaced repetition schedules

It decides when the recall happens so you do not have to.

Goals and revision plans direct

They determine which material gets the time, and in what order.