一心多用到底可不可行? What multitasking does to your brain

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一心一意还是一心二用?科学家通过研究发现,我们最多只能同时注意四个物体,太多了大脑会承受不住,注意力会分散。一心多用在最好的情况下会让我们效率低下,而在最坏的情况下会让我们非常危险。无论是工作还是学习,都要保持专注度。

With life getting more demanding and hectic all the time it seems there's only one way to cope - multitasking!

Gurus and life hackers make a living telling us how to get better at it.

But can we actually multitask?

The term was first used in the '60s, to describe computer performance.

The human brain, though, is not a computer and human attention is a very limited resource.

Some psychologists model visual attention as being like a spotlight.

It can only be shone in one direction at any one time.

Our primary focus - what we're paying most attention to - is like the brightly lit area in the centre of the beam.

It can also be understood as being like a zoom lens - we can choose to narrow our focus to concentrate in detail, or widen it, to be aware of more things simultaneously.

But we can't be zoomed in and out at the same time.

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