Yes, retrieval and testing does work, but what limits the effect? Insights from a new meta-analysis

From experience to meaning...

A new meta-analysis does confirm memory retrieval can be beneficial for learning, but also shows there are limits:

  • the frequency and difficulty of questions.
  • Simply asking a question is not enough; students must respond to see a positive effect on learning

Probably you now want to know how much is too much? Well, you’re in for a bit of a disappointment I’m afraid, as you can learn from the press release which explains it better than the original paper imho:

“Frequency is a critical factor. There appears to be a trade-off in how often you test students,” Chan said. “If I lecture nonstop throughout class, this lessens their ability to learn the material. However, too many questions, too often, can have a detrimental effect, but we don’t yet know exactly why that happens or how many questions is too many.”

The answer to that question may depend on the length…

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