A survey of a group of people between the ages of 75 and 80 found that those who regularly played the card game bridge tended to have better short-term memory than those who did not play bridge  It was originally concluded from this that playing bridge can help older people to retain and develop their memory
arguing that the original conclusion relied on an inaccurate understanding of the motives that the people surveyed have for playing bridge
 However, it may well be that bridge is simply a more enjoyable game for people who already have good short-term memory and who are thus more inclined to play