BrainGym

Catalog

Exercises

Eight short drills, each training one specific mental skill. All eight open right now with no account needed.

The Ledger

working-memory updating (verbal/numeric) — holding and updating a running total across a chain of steps.

Track a running total through a chain of plus and minus steps, entirely in your head.

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The Nets

math-fact fluency via retrieval practice / spaced repetition (a 3-box Leitner system).

Drill multiplication facts with a spaced-repetition system that shows your weak spots more often.

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The Vault

spatial working memory (a Corsi-block-style sequence recall task).

Watch a sequence of lit-up squares, then tap them back in the same order.

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The Appraiser

estimation and magnitude judgment, with a commit-before-reveal structure (state your guess before seeing the true value, forcing genuine estimation rather than adjustment).

Estimate a real number before it's revealed, and see how close your gut gets.

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The Briefing

reading comprehension via retrieval, not re-scanning (the passage is not visible while answering).

Read a short passage, then answer questions about it from memory alone.

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The Switch

cognitive flexibility / task-switching (the "switch cost" paradigm from cognitive psychology).

Switch between two rules on the fly and see the cost it takes on your reaction time.

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The Signal

inhibitory control / selective attention (a classic Stroop color-word interference task).

Name the ink color, not the word — a classic test of ignoring what a word says.

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