Education10 min read
What Is Working Memory, and Can Training Actually Change It?
What working memory is, how small its capacity really is, and an honest account of why researchers still disagree about whether training transfers to anything.
Topic hub · 22 articles
Memory and Attention Practice
Working memory is the small amount of information you can hold and manipulate at once, and it is genuinely limited — the classic estimates cluster around four items for most material, not the seven the popular version claims. That limit is why mental arithmetic gets hard as numbers get longer, and why a phone number is easier to hold as three chunks than as ten digits.
What changes with practice is mostly not the limit. It is the strategy: chunking, rehearsal, and encoding material into a form that holds more per slot. A digit span improves largely because the person found a better way to group the digits, which is a real and useful skill even though it is not an expanded container.
These articles cover the span tasks themselves, the encoding strategies that make them easier, the difference between recall and recognition, and what the attention literature says about focus, interference and task switching.
Where to start
Understand the limit before training it
The cornerstone article covers what working memory is, how it is measured, and what training does and does not move.
Strategy beats effort
Chunking and elaborative encoding change performance more than repetition does. The technique articles cover each method concretely.
Attention is a filter, not a spotlight
Most attention failures are interference, not weakness. The attention articles cover what that means for practice design.
Start here
Everything else in this hub
- Education6 min read
Attention Span Exercises, and What They Do Not Fix
What attention span actually means, what attention exercises reliably change, what the trials found about transfer, and what to do instead.
- Education5 min read
Saying It Backwards: Why Reversal Costs You Digits
Reversing a sequence adds a second job on top of holding it. Why backward span runs shorter than forward span, and what that gap is actually telling you.
- Education6 min read
What Is Missing? Change Detection and the Blindness Behind It
How change detection tasks work, what change blindness does and does not prove, and why spotting a removed item depends on what you encoded.
- Education5 min read
Delayed Recall: What a Blank Pause Does to an Answer
A retention interval is the gap between learning something and being asked for it. Why an empty pause is easy, a filled one is brutal, and what follows.
- Education5 min read
Digit Span: What the Number Actually Means
A digit span is the longest run of numbers you can repeat back. How the stepped procedure produces that figure, and why an app's best span is not a test score.
- Education7 min read
Grid Memory: Remembering Where, Not Just What
How grid and position memory tasks work, why location is its own kind of content, and the strategies that help on a grid but not on a list.
- Education6 min read
Growing Sequences: Where Simon-Style Games Break People
Why growing-sequence memory games break down in the middle of the list, what the serial position curve predicts, and how chunking moves the break point.
- Education6 min read
Concentration: The Conditions That Beat Willpower
Concentration is mostly a matter of conditions, not effort. What interruption research shows, and how to set up a session you can actually finish.
- Education5 min read
How to Memorise Numbers: Four Methods Compared
Grouping, meaning, phonetic encoding and spatial placement each cost something different. A side-by-side comparison so you can pick the right one.
- Education6 min read
Interference: Why New Numbers Push Out Old Ones
Forgetting is often competition rather than decay. What proactive and retroactive interference are, how big the effect is, and how switching content helps.
- Education5 min read
Judging Your Own Recall: The Fluency Illusion
Why your sense of knowing something is a poor predictor of recalling it later, what causes the illusion, and how to grade yourself honestly.
- Education6 min read
Mnemonic Systems Built for Digits
Phonetic, shape, rhyme and peg systems all convert digits into something easier to hold. What each one asks of you before it starts paying anything back.
- Education6 min read
What an N-Back Task Actually Asks You to Do
What an n-back task asks you to do, why dual n-back feels unlike other memory games, and what the training studies actually found about transfer.
- Education6 min read
Paired-Associate Learning: Linking Two Unrelated Things
What paired-associate learning is, why arbitrary pairs resist repetition, and why judging a pair with both halves in front of you overstates what you know.
- Education5 min read
Recognition Is Easier Than Recall, and That Matters
Picking an answer from a list is a different job from producing it from nothing. Why the gap exists, and why multiple-choice practice flatters what you know.
- Education5 min read
Remembering One Long Number: Grouping, Rhythm and Rehearsal
Holding a number for thirty seconds is a different problem from memorising it. What the rehearsal loop can carry, and what reliably knocks a number out of it.
- Education5 min read
Short-Term Memory and Working Memory Are Not the Same
One holds information; the other holds it while you do something to it. What separates the two terms, and a quick test for telling which a task needs.
- Education6 min read
Processing Speed as a Concept, and How It Gets Measured
What processing speed means as a psychological construct, how it is measured, and why the response time an app records is a task time rather than a score.
- Education7 min read
Designing Memory Games That Are Not Just Matching Pairs
Matching pairs is one memory task among many. The formats we built instead, what each one actually stresses, and the ones that did not survive testing.
- Education6 min read
How to Remember Historical Dates Without Rote Drilling
Anchoring, chunking and sequence-first methods for holding onto dates, and why memorising isolated years is the least effective approach.
- Education4 min read
Memory Techniques That Actually Work
Chunking, the method of loci, elaboration and retrieval practice — which memory techniques have support, and the important limit on what any of them do.