Learning Science · Retrieval, interference and forgetting

Retrieval can change later learning

Recognise retrieval as an activity that can influence later memory, with benefits depending on what is retrieved and corrected.

Use the examples to connect this lesson with the earlier topics. No specialist equipment is needed.

Back to the chapter

After reading, you can

Explain a retrieval practice cycle
State limits of a testing claim

A test can be practice

After studying a short passage, a learner closes it and explains the main idea. This retrieves knowledge rather than merely exposing it again. The act can change later learning, so a check is not always a passive measurement.

Research comparing retrieval with restudy shows that immediate performance and later retention can differ. One original prose-learning study found an advantage for prior testing on delayed checks even when rereading looked better immediately. That finding does not establish that every test format, topic or learner will benefit equally.

Retrieve the right content

Use questions that require important ideas, relationships or actions. If practice retrieves only isolated labels, it may neglect explanation and application. Include coverage of central content and avoid repeatedly testing only what is already easiest.

After retrieval, compare with a reliable account and repair errors. Feedback is especially important when recall is incomplete or inaccurate. A learner who has not received enough instruction may need a worked example before an attempt can be productive.

Separate practice and evaluation

A low-stakes practice check can support learning without attaching a high-stakes judgment to every mistake. When an assessment is intended to measure learning, remember that repeated exposure to the assessment itself can change performance. Document prior practice and use fresh relevant tasks when examining generalisation.

Retrieval can also concentrate practice on the selected content while other material receives little attention. Review coverage across the learning goal. A quiz that repeatedly retrieves the same memorable fact may yield high scores without maintaining neighbouring concepts or the conditions needed for application. Vary questions purposefully and check omitted content too.

Worked example

Retrieving an argument

A short practice argument says the library should open later on Tuesday so evening learners can attend, provided staff cover is available. How can retrieval and correction target its structure?

Read the argument, close it and state the claim, supporting reason and condition. The claim concerns later Tuesday opening; the reason is access for evening learners; the condition is available staff cover.
Compare the response with the text. If the learner gives the claim and reason but omits staff cover, restore that qualification and explain how it limits the recommendation. Do not treat a fluent incomplete summary as a fully accurate one.
Later use a different prompt: “What would block this recommendation even if evening access is valuable?” Check whether the learner can retrieve and use the staffing condition without copying the original sentence.

The cycle retrieves meaningful structure, checks it and repairs a specific omission. The later prompt asks the learner to use the restored condition, rather than merely repeat the corrected sentence.

Retrieve the claim, reason and condition

The source argument recommends later Tuesday library opening because evening learners need access, provided staff cover is available. The first retrieved version omits staff cover. Comparison identifies that omission; correction restores the condition and explains its role. A later changed prompt asks what would block the recommendation. This is an original illustrative argument, not an experimental result.

Try it yourself

Think through each question before opening the answer.

Why is retrieval practice more than rereading?
Show the answer and reasoning
It requires bringing information to mind using the prompt, rather than relying on the full visible answer.
With the passage closed, the learner must produce its content from the prompt. Visible rereading can support study but does not require the same retrieval operation.
Does a retrieval benefit mean instruction is unnecessary?
Show the answer and reasoning
No. Accurate initial knowledge, suitable task demands and correction remain important. Retrieval is one part of a learning cycle.
A learner needs accurate knowledge to retrieve, and an incomplete response needs checking. Retrieval complements instruction; unsupported guessing is not a substitute for learning the content.
A quiz repeats the same easy date every session but never asks for the event’s causes or consequences. What should be changed?
Show the answer and reasoning
Broaden the questions to retrieve the central relationships and omitted content as well as the date.
A high score can reflect narrow repeated coverage. The selected retrieval content determines what is being practised; coverage should match the full learning goal.

What to carry forward

Retrieval can influence later memory.
Ask for important knowledge and relationships.
Check and repair the retrieved response.

References

Sources supporting the explanations and learning checks in this lesson.