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Working Memory Drills That Actually Work

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Dr. Owen Brackley

Cognitive science contributor

Owen is a cognitive-science researcher who plays far too many puzzle games. He writes the science pieces and fact-checks every percentile claim we make.

Published 2026-09-25 · Updated 2026-10-04 · 6 min read

Four drills that raise your working-memory percentile on PlayJoy, and why naming what you see beats staring at it.

Working memory is the mental scratchpad that holds a handful of facts while you use them. It is the dimension most players can move fastest, because unlike raw processing speed it responds to technique within a couple of weeks.

Here are the four drills we see working in the data.

Drill 1 — Name everything out loud

In Memory Match, silently naming each card you flip roughly halves the number of flips strong players need. Naming converts a fragile visual trace into a verbal one, and verbal traces survive for far longer than a mental picture.

Drill 2 — Chunk, never list

Human working memory holds around four chunks, not seven separate items. In Sudoku, do not remember individual candidate digits; remember "this box needs 4, 7 and 9" as a single chunk. The same trick applies in Minesweeper: remember a pattern, not individual squares.

Drill 3 — Delay the easy win

When you already know where a matching pair sits, do not flip it immediately. Hold that fact while you gather one more. This is uncomfortable for the first few sessions and then becomes automatic — and it is the difference between a good score and a great one.

Drill 4 — Train at the edge of failure

If a board feels easy, your working memory is not being loaded and nothing adapts. Move up a level, or switch to a game whose primary dimension is memory rather than speed.

FAQ

Is this medical advice?

No. PlayJoy percentiles are a game-training signal, not a clinical assessment. If you have concerns about memory, speak to a clinician.

Put it into practice

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