Children care about their reputation from age of two
It has long been assumed that childhood is a time of innocence, free from the shackles of social conformity, when youngsters act naturally on instinct rather than by convention.
But research shows that even by the age of two, children are already crippled by the scrutiny of others and will change their behaviour if they are being watched to boost their reputation.
Scientists at Emory University in Atlanta, Georgia, found that by 24 months toddlers showed signs of inhibition and embarrassment when aware that they are being observed and attempt to "manage their image".
The study, published in the journal 'Development Psychology', concludes that social anxiety emerges in humans far earlier than had been thought.
"There is something specifically human in the way that we're sensitive to the gaze of others," said Philippe Rochat, senior author of the study. "At the very bottom, our concern for image management and reputation is about the fear of rejection, one of the main engines of the human psyche."
The rise of social media has made it clearer how adults feel about their image.
People report feeling crushed if a post does not receive sufficient "likes".
To test how early social anxiety emerges, scientists carried out several experiments involving 144 children between the ages of 14 and 24 months using a remote-control robot.
A researcher either watched the youngster playing with it, or turned away and pretended to read.
When the child was being watched, they showed more inhibition and embarrassment than when the researcher was not watching.
In a second experiment, the researcher used two different remote controls when demonstrating the toy, saying, "Wow! Isn't that great?" with the first and "Uh-oh! Oops, oh no!" with the second. They found children used the remote control associated with the negative response more when not being watched, choosing the positive one when under the gaze of the researcher.
Youngsters were then shown the toy being operated by two researchers, one who said, "Yay! The toy moved!" and one who frowned and said, "Yuck! The toy moved!"
When the child was invited to play they were much more likely to press the remote when the researcher who gave a positive response was watching.
"We've shown that by the age of 24 months, children are not only aware that other people may be evaluating them, but they will alter their behaviour to seek a positive response," said doctoral student Sara Valencia Botto, first author of the study.
"This behaviour is like older children who behave well and do good things while others are watching and misbehave when no one is paying attention.
"Our concern for reputation is something that defines us as human."
Previous research found the same behaviour by the time a child reached four, but the latest study suggests it emerges far earlier.