What is retrieval practice and how is it used in the science of learning?

• A. A passive recording of information.
• B. Rereading material to reinforce memory.
• C. A strategy where learners recall information from memory to strengthen learning; used with varied retrieval intervals and interleaving.
• D. Feedback provided only after exams.

Answer: (C)

Retrieval practice is the process of actively recalling information from memory to strengthen learning. The idea behind it is the testing effect: the act of retrieving a memory makes it more durable and easier to access in the future, often more effectively than simply re-reading or passively reviewing.

In effective retrieval practice, learners try to recall information without looking at their notes, then check accuracy and fill gaps. It’s especially powerful when retrieval is spaced over time (varied retrieval intervals) rather than done all at once, and when practice mixes different topics or problem types (interleaving). Spacing helps long-term retention by giving the memory system a chance to reconstruct and reinforce the knowledge, while interleaving trains you to distinguish between concepts and apply the right approach in different contexts.

On a practical level, this means quizzing yourself, writing or saying key terms and steps from memory, and then studying the correct answers, with practice sessions distributed across days or weeks and including a mix of topics. This approach builds stronger, more flexible recall than strategies that involve mostly rereading or passive notes.

Other options describe passive study or delayed feedback, which don’t capture the core practice of actively retrieving information from memory and reinforcing it through spaced and interleaved practice.