What Makes People Shy?

"The brains of shy or introverted individuals might actually process the world differently than their more extroverted counterparts.
About 20 percent of people are born with a personality trait called sensory perception sensitivity (SPS) that can manifest itself as the tendency to be inhibited, or even neuroticism. The trait can be seen in some children who are "slow to warm up" in a situation but eventually join in, need little punishment, cry easily, ask unusual questions or have especially deep thoughts.
The new results show that these highly sensitive individuals also pay more attention to detail, and have more activity in certain regions of their brains when trying to process visual information than those who are not classified as highly sensitive.

Individuals with this highly sensitive trait prefer to take longer to make decisions, are more conscientious, need more time to themselves in order to reflect, and are more easily bored with small talk, research suggests. those with a highly sensitive temperament are more bothered by noise and crowds, more affected by caffeine, and more easily startled. That is, the trait seems to confer sensitivity all around.


The sensitivity trait is found in over 100 other species, from fruit flies and fish to canines and primates, indicating this personality type could sometimes provide an evolutionary advantage.

Biologists are beginning to agree that within one species there can be two equally successful "personalities." The sensitive type, always a minority, chooses to observe longer before acting, as if doing their exploring with their brains rather than their limbs. The other type "boldly goes where no one has gone before,"
The sensitive individual's strategy is not so advantageous when resources are plentiful or quick, aggressive action is required. But it comes in handy when danger is present, opportunities are similar and hard to choose between, or a clever approach is needed."

Daqui