Spaced retrieval practice improves long-term retention because spacing makes retrieval more effortful and strengthens memory representations. Which implementation best reflects spacing?

• A. Quizzing every item in one long session with no rest.
• B. Scheduling quizzes at increasing intervals over weeks.
• C. Avoiding tests to prevent anxiety.
• D. Studying only right before the exam.

Answer: (B)

Spacing in retrieval practice relies on the idea that spreading retrieval attempts over time makes the memory harder to access on purpose, which strengthens the memory traces and boosts long-term retention. Scheduling quizzes at increasing intervals over weeks embodies this by forcing you to recall information again after longer gaps, so each retrieval helps consolidate the memory for the future. This approach uses desirable difficulties to deepen learning, making recall more durable than if you tested everything in one long session. It also contrasts with cramming or studying only right before an exam, which don’t provide the repeated retrieval across time that strengthens memory, and with avoiding tests altogether, which eliminates retrieval practice. Therefore, scheduling quizzes at increasing intervals over weeks best reflects spacing.