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No. 169 · Work · General Thinking

Spacing Effect

We remember more when learning is spread out than when it is crammed.

The Spacing Effect shows that we remember more when we revisit material in shorter sessions spread across days or weeks, instead of cramming it all at once. Each spaced review strengthens retention and understanding, which is why tools like Anki and Duolingo schedule repetitions over time.

Break learning into small, regular sessions and review key ideas at growing intervals. Use a calendar, reminders, or a spaced repetition app to stay consistent. The same rhythm works for skills, fitness, reading, and music: a little often beats a lot at once.

In the Almanac

“Ebbinghaus forgets on purpose”, 1885 · “Anki”, 2006

Both stories in full, three ways to use it and where it misleads.

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Spacing Effect

Questions

What is Spacing Effect?

The Spacing Effect shows that we remember more when we revisit material in shorter sessions spread across days or weeks, instead of cramming it all at once. Each spaced review strengthens retention and understanding, which is why tools like Anki and Duolingo schedule repetitions over time.

How do you use Spacing Effect?

Break learning into small, regular sessions and review key ideas at growing intervals. Use a calendar, reminders, or a spaced repetition app to stay consistent. The same rhythm works for skills, fitness, reading, and music: a little often beats a lot at once.

When does Spacing Effect matter?

Spacing Effect is one of the 43 mental models for work, the situations where you ask: How do I get the right things done? Within that, it belongs to “Building skill”, alongside Comparative Advantage, Deliberate Practice and Divergent Thinking vs Convergent Thinking.

What is an example of Spacing Effect?

Two stories show it at work: Ebbinghaus forgets on purpose (1885) and Anki (2006). Both are told in full in The Mental Models Daily Almanac, which has two stories for each of its 365 models.

Which mental models are related to Spacing Effect?

Deliberate Practice, Compounding Effect and Feedback Loops. Spacing Effect itself comes from general thinking.