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Most of us have ducked away from a 'madman' in the street, only to realise they are in fact using a Bluetooth headset. 大部分人在街上碰上自言自语的人，会觉得他们有问题，然后赶紧躲开，可是走近了才发现人家是用蓝牙耳机打电话。 Now a new University of Pennsylvania study shows that wandering along muttering, 'keys, keys, keys' can actually help (normal, sane) people find lost objects. 宾夕法尼亚大学的一项最新研究显示如果一个（正常，神智清醒）的人丢了钥匙，一边找一边念叨“钥匙，钥匙”可以帮助他快点把钥匙找出来。 Saying a word helps focus the mind on something people are looking for - and it works more effectively than seeing a written description. 说出你要找的东西可以帮你将注意力集中到这件物品上，这比见到书面描述要有效得多。 Repeating the word over and over again helps even more. 不断重复念要找的东西会更加管用。 Previous work has suggested children speaking to themselves while performing step-by-step tasks, like tying shoelaces, can help guide their behaviour and let them focus on the job in hand. 之前有研究发现儿童在一步步完成像系鞋带这样的任务时会不断跟自己说话，可以帮助孩子们指导自己的行为，让他们集中注意力干手头的事情。 However, scientists were not sure if speaking aloud when completing tasks could help adults in the same way, especially when looking for particular objects. 但是，科学家不能确定这样做对成年人是否有效，特别是找东西这种情况。 | 
