From Florida State 24/7 (selected portions):
Knock, knock! Who's there? Cows go. Cows go who? No, cows go moo!
OK, OK. So it's not a side-slapper — especially if the teller has zero sense of comic timing. But most likely the person sharing the joke over the water cooler thinks he or she is pretty funny.
No matter how badly the joke is told, it will sometimes elicit a few polite laughs.
Because social norms make us averse to providing negative feedback, says Joyce Ehrlinger, a Florida State University assistant professor of psychology whose latest laboratory research recreated everyday interactions in which people might feel pressured to withhold negative information.
Ehrlinger's findings, which will be presented at the American Psychological Association's 120th convention in Orlando, Fla., in August, are described in her recent paper "Polite But Not Honest: How an Absence of Negative Social Feedback Contributes to Overconfidence."
Ehrlinger maintains that because society trains us not to hurt others' feelings, we rarely hear the truth about ourselves — even when it's well deserved. And that can be a problem for overly self-confident people who carry around inaccurate, overly positive perceptions of how others view them.
"There's definitely no harm in some types of overconfidence, and I am not suggesting that we should stop living in a polite society. The worst that might come from someone believing that they are funnier than, in reality, they are is a bit of embarrassment or wasted effort auditioning for 'America's Got Talent.'"
That said, she argues it's important to note when politeness might come at a cost. There are many times when overconfidence carries serious consequences.
"Overconfident doctors and lawyers might offer their patients or clients poor advice," she said. "There are ways in which overconfidence is dangerous, and it might be important to set aside politeness in the service of helping people avoid the perils of overconfidence."