Delayed judgment of learning

Wait several minutes after study before rating how well you will remember — early ratings are systematically too high.

Why it works

Immediate JOLs are inflated by the residual activation of information in working memory — the item is unusually accessible right after study, producing a high feeling of knowing that does not reflect durable encoding. Nelson and Dunlosky showed that delaying JOLs by even a few minutes — long enough for working memory activation to fade — dramatically improves their accuracy as predictors of later recall. The delay forces the judgment to draw on long-term memory, which is the target the learner actually cares about.

How to do it

1. After studying an item or section, do not rate it immediately.
2. Study several other items first, or take a brief break, before returning to rate the original.
3. Make the rating after at least 3–5 minutes: "How confident am I I will recall this tomorrow?"
4. Use the delayed rating to decide whether to restudy now or schedule a later review.

Evidence

Nelson and Dunlosky (1991) demonstrated that delayed JOLs predicted later recall substantially better than immediate JOLs — a finding robust enough to be called the "delayed JOL effect." (rct)

The delayed JOL effect is robust in controlled studies but has mostly been demonstrated with paired-associate learning tasks; generalization to complex material is plausible but less directly tested.

Sources

• Nelson & Dunlosky (1991), "When people’s judgments of learning (JOLs) are extremely accurate at predicting subsequent recall," Psychological Science

Common mistake

Rating comprehension immediately after reading or hearing information, when the material is still in working memory and artificially accessible, producing a high JOL that will not survive 24 hours.