More specifically, the density and volume of the gray matter changed in the brains of those people with significantly improved IQ points.

更具体点说就是，那些IQ显著提高的人大脑中灰质的密度和体积都增加了。

Recent research has also shown that short-term memory, traditionally regarded as only one aspect of one’s IQ, may in fact be the lever that can raise overall intelligence.

近来有研究表明，我们原本认为只是IQ的一个方面的短期记忆，事实上可能是“撬动”整体智力水平的一个“杠杆”。

Scientists led by Susanne Jaeggi of the University of Michigan, US, found in 2008 that short-term memory may be the foundation of pure intelligence to a greater extent than anyone suspected.

来自美国密歇根大学由苏珊娜?耶吉领导的一支科学家团队于2008年发现，短期记忆力对智力的直接促进作用可能超乎任何人的想象。

They trained adult volunteers on a difficult short-term-memory task: simultaneously hearing a string of letters and seeing a series of computer screens that had a blue square in different places.

他们对成年自愿者做了培训，让他们完成一项颇具挑战性的短期记忆任务。一边听研究人员说的一连串字母，一边同时观察一组电脑屏幕上显示的蓝色方框的位置，每个屏幕的蓝框位置各不相同。

The volunteers then had to identify when the spoken letter or the square’s position matched that of several screens earlier.

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