Quick answer: Short-term memory holds a handful of items for seconds to about a minute — like a phone number you're about to dial. Long-term memory is your durable archive with effectively unlimited capacity. Information moves from short-term to long-term through attention, repetition and sleep.
Short-term: the desk
Think of short-term memory as a small desk: roughly 4–7 items sit on it at once, and anything not actively used slides off within about a minute. It's built for right-now tasks — holding a number, following directions, finishing a sentence you started.
Long-term: the filing room
Long-term memory is the filing room behind the desk — vast, durable, and organized by meaning and association. Your childhood address lives there next to how to ride a bike.
How information makes the jump
- Attention decides what's even eligible — distraction is the number-one reason things never transfer
- Meaning and connection file it — linking new facts to things you know beats raw repetition
- Spaced repetition strengthens the file each time you revisit it
- Sleep runs the overnight filing shift — consolidation happens largely while you sleep
The practical takeaway
Most everyday "bad memory" is a transfer problem: too little attention at encoding, too little sleep for consolidation. Fix those two and the filing room mostly takes care of itself — our sleep and memory guide covers the biggest lever.
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