Spacing refers to strategically spacing out study sessions over time to improve retention.

• A. Interleaving
• B. Spacing
• C. Retrieval
• D. Storage

Answer: (B)

Spacing is the spacing effect in action: spreading study sessions over time to strengthen memory and long-term retention. When you revisit material after a delay, you have to retrieve it and re-encode it, which builds stronger retrieval paths and makes what you’ve learned more durable. This distributed practice also helps you form more flexible, transferable knowledge because you encounter the material in different contexts and with varying prompts over time. A well-designed spacing plan often starts with shorter gaps after initial learning and gradually increases the interval between reviews, maintaining a balance that keeps you from forgetting but also reinforces memory at optimal moments. Interleaving mixes different topics within a single session, which is a different technique for enhancing discrimination and transfer. Retrieval practice emphasizes actively recalling information from memory rather than rereading, and storage refers more to memory itself rather than a study strategy.