Cramming, working memory, and why your study group is making you dumber
Working memory holds about four things at once. Cramming and group study both quietly blow past that limit, and then wonder why nothing stuck.
Cognitive load theory splits the effort of learning into three buckets: the intrinsic difficulty of the material, the extraneous load from how it's presented, and the germane load that actually builds understanding. You want to crush the second one so the third has room to work.
Why group study often backfires
A study group adds social monitoring, conversational threads, and the cognitive cost of explaining things on someone else's schedule. That's extraneous load. It feels productive because it's busy. Busy and learning are different states.
- Pre-process alone: get the material into a clean summary before you meet anyone.
- Use the group for testing, not first-exposure learning. Quiz each other.
- Cap a session at one topic. Four chunks, then a break.
The night before, your job is not to learn new material. Your working memory is too taxed by stress. Your job is to consolidate. Run a Feynman pass on the three topics you're least sure of, sleep, and trust the spacing you already did.