Supose you are reading a newsper,there is an article ROGER FEDERER WON THE MATCH. Now the people of switzerlan will be happy, if you are happy then you automatically do good things,your level of confidence increases and almost all the people of switzerlan come togather.
Supose you are reading a story from your text book,story make you emotional. If you are reading physics then many questions come in your mind that who invent this theory,why he invent this,after invention what will happend,is there any loophole in this theory. These all things increase your thinking potensial.
If you are using net there are so many things like news,social sites,porn movies etc. Then which thing you are looking first,how much time you spend in which topic,which topic make you happy,which is emotional or satisfy you
So every thing is realated to psychology,but you should aware about that.