Why is that notion funny? There's plenty of disagreement over when personalities become set.
http://www.msnbc.msn.com/id/22554554/
Personality may be set by preschool
Study finds shy kids stay shy while rambunctious tots withdraw some
By Linda Carroll
msnbc.com contributor
updated 5:44 a.m. PT, Tues., Jan. 15, 2008
Ever wonder if that quiet girl who hid in the back corner of the classroom ever burst out of her shell? Perhaps she became a whiz at computers. And what about the class clown? Did all his attention-grabbing antics develop into a charm that would later earn him big bucks selling timeshares in Bermuda?
New research shows that in most cases the personalities displayed very early in life — as young as preschool — will stay with us into adulthood.
The new study, which appears in the February issue of the Journal of Personality, followed 103 kids for 19 years, starting when they were age 4 and ending when they hit their early 20s. To get an initial sense of the preschoolers’ personalities, the researchers surveyed both teachers and parents when the children were ages 4, 5 and 6. Based on the observations of their parents and teachers, the children were identified as having one of three personality types: overcontrolled, undercontrolled or resilient.
The overcontrolled kids were generally the ones most of us would categorize as shy: quiet, self-conscious, uncomfortable around strangers. “Overcontrollers control their emotions too much,” explains Dennissen. “So they are less able to act ‘natural’ and ‘spontaneous.’ Because they are so slow to warm up, they are seen by others as shy.”
Undercontrollers have too little control over impulses, Dennissen says. “When they feel frustrated they may act aggressively towards others, notwithstanding the negative consequences.”
The resilient kids are the ones in the middle who are good at modulating their emotions, interacting with others and bouncing back from adversity.
Some Mature Faster Than Others
Over the course of the study, Dennissen and his colleagues checked back in on the kids through questionnaires filled out by the parents every year up until the children were 10, and then again when the children reached the ages of 12, 17 and 23.
Interestingly, compared to the resilient children, both undercontrollers and overcontrollers took longer to move into adult roles, such as leaving home, starting a romantic relationship or finding a career. Accomplishing these milestones requires social adeptness that over- and undercontrollers may take longer to develop.