Strength of memory

Durability of memory traces in the brain. The stronger the memory, the longer we can remember it.

We can roughly describe forgetting with R=e^(-t/S) where R is [memory retention]?, S is relative strength of memory and t is time.

The best methods for increasing the strength of memory are:

1. better memory representation (e.g. with mnemonic techniques)
2. repetition based on active recall (esp. spaced repetition)