Which of the following strategies does LifeX recommend to enhance retention?

Revisiting questions after a certain period is a highly effective strategy for enhancing retention. This technique, often referred to as spaced repetition or distributed practice, leverages the psychological spacing effect, which suggests that information is better retained when it is reviewed periodically over time rather than in a single, intensive session.

By revisiting questions and material after a certain duration, learners reinforce their memory pathways and strengthen their long-term retention of the information. This approach takes advantage of the brain's natural tendency to forget, allowing the individual to recall and engage with the material multiple times, thereby deepening understanding and memory retention.

This method is particularly effective because it encourages learners to engage in active recall, which is the process of actively stimulating memory during the learning process. Engaging with the material in this way, rather than simply rereading or passively reviewing, is known to enhance retention significantly more than other strategies that do not incorporate spaced reviews or active engagement with the material.