The Testing Effect — the research, and how to use it at events

The research, plainly

Roediger and Karpicke had students either re-study a passage or take practice tests on it. A week later, the tested group remembered far more — retrieval practice built durable memory while re-reading built only familiarity. Testing isn't measurement; it's the training itself.

The receipt: Roediger & Karpicke, 2006

What it means for events

Follow-ups that re-send the deck build nothing. Follow-ups that ask — 'which of the three plays did you run?' — force retrieval, and retrieval is what installs the content. Quiz your audience, gently and often, forever.

Where to run it

Post-event sequence

Every touch asks instead of tells: one retrieval question per email. The answer matters less than the reaching for it.

In-event design

End sessions with recall, not recap: 'Write the one thing you'll quote tomorrow' beats a summary slide.

Certification programs

Frequent low-stakes quizzes across weeks beat one high-stakes exam — the testing IS the curriculum.

Seen in the wild

Duolingo, Anki, and the whole retrieval-practice movement in education are Roediger's finding turned into products — and this Lab's own certification is built on it: the quiz is the teaching.

Related concepts

The Spacing EffectOne big dose is forgotten. Small doses over time stick.The Generation EffectPeople remember what they produce far better than what they receive.The Question–Behavior EffectJust asking people whether they'll do something makes them more likely to do it.

All 115 concepts in the Library →

Now use it

Score your own event against principles like this one — or make the whole vocabulary official.

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