Research surfaced recently that revealed the true drivers of intelligence. They asked, “Is intelligence simply the ability to assimilate information and recall upon it whenever needed?” Is intelligence really a measure of memory? If not, than what makes a person intelligent? Amazingly, they found that intelligence is not founded on one’s memory. Instead, intelligence emanates from one’s ability to control their selective attention. It’s their ability to control the three phases above, and where they route their blood-flow to within the prefrontal cortex.
As you improve in the ability to strategically allocate your attention, your brain also improves. In fact, it rewires itself. As you exercise concentration and selective attention, your mind rewires itself to support your new habits. You get better and better at concentrating when you concentrate. That’s the good news.
Here is the whole story: http://www.howtogetfocused.com/chapters/8-things-everybody-ought-to-know-about-concentrating