Research suggests that balling up your right hand and squeezing it tightly actually makes it easier to memorise phone numbers or shopping lists.
Volunteers were told to memorise pairs of words.
They are expected to memorise rules and understand that following them isn't optional.
" One drawback of the card is that customers will no longer be able to memorise their security code and will need to check every time they want to make an online purchase.
The best way to memorise newly-acquired knowledge is to go to sleep, scientists believe.
