Evidence-based, not vibes-based.
We default to the study modes the cognitive science literature actually supports:
- Interleaving over blocking. Brunmair & Richter (2019) found interleaving wins for confusable categories — exactly what licensure exams test. Effect size g ≈ 0.42, up to 0.67.
- Spacing over cramming. Latimier (2021) showed expanding-interval flashcards are ~70% more efficient per study minute than uniform intervals.
Retrieval over re-reading. Roediger & Karpicke (2006): re-testing failed items is the strongest path from “got it wrong” to “memorized.”Retrieval over re-reading. Roediger & Karpicke (2006): re-testing failed items is the strongest path from “got it wrong” to “memorized.”
We tell you why the harder mode is the better mode, because users systematically misjudge desirable difficulties (Bjork). The path that feels less productive is usually the one that works.
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