A new study at the University of Iowa supports the idea that being shy oroutgoing is based on how your brain functions. The study uses the latest technology to scan brain activity. U-of-I researchscientist Debra Johnson says people who are introverted have more brainactivity in the areas of the brain used for planning, thinking andremembering. She says people who are extroverts tend to have more brainactivity in areas of the brain known as centers for sensory processing.Johnson says there are no good or bad conclusions to be made about whicharea of the brain you use.Johnson says it isn’t known if we are born shy or outgoing, or if thosetraits and use of the brain develop through the things we experience inlife. Johnson says there wasn’t much difference between men and women in thestudy, but she says the study group wasn’t large enough to draw anyconclusions on the differences between men and women.