Bojinov and colleagues designed a game lasting 30 to 45 minutes in which players intercept falling objects by pressing a key. The objects appear in one of six positions, each corresponding to a different key. Positions of objects were not always random. a hidden sequence of 30 successive positions was repeated over 100 times. Players made fewer errors when they encountered this sequence on successive rounds. This learning persisted when the players were tested two weeks later.

via Neuroscience joins cryptography.