Trust the harder-feeling session

Expect interleaving to feel worse in the moment — and judge it by later recall, not present ease.

Why it works

Learners systematically misjudge interleaving because they read fluency (how smooth practice feels) as a proxy for learning. Interleaving lowers in-session fluency while raising durable learning, so the felt experience and the actual outcome point in opposite directions.

How to do it

1. Before starting, accept that this session will feel slower and more error-prone.
2. Rate your confidence after the session, then test yourself a day or two later.
3. Compare delayed-test results, not in-session smoothness, when deciding what works.

Evidence

Across multiple studies, participants predict blocked practice will help more even after interleaving produces better delayed performance — a robust metacognitive illusion that fluency is mistaken for learning. (rct)

This is about a perception gap, not a guarantee; the practical claim is "do not trust in-the-moment ease as your measure," which the evidence supports well.

Common mistake

Abandoning interleaving after one uncomfortable session because it "felt unproductive," when discomfort is the expected signature of the more effective method.