Spacing Effects in Learning: A Temporal Ridgeline of Optimal Retention
Abstract
Comprehensive analysis of optimal spacing intervals across different retention periods, establishing the relationship between inter-study intervals and test delays.
Used in syntheses
Questions this source addresses
- How does the timing of practice change what we remember?
- When does mixing different kinds of practice help us learn?
- When should an intelligent tutor make learning harder?
- Why do some things we learn stay with us?
- How does the optimal gap between study sessions scale with the desired retention period?
- What review schedule results from expanding intervals by factors of 2.5-3.5, as suggested by Kang's research?
- What spacing gaps are recommended for achieving 1-week, 1-month, and 1-year retention targets?
- Why do fixed-interval spaced repetition systems underperform adaptive algorithms?