Our happy hour fact to amaze your drinking buddy with.

It's been found that if a child is spanked, his IQ will be lower.

Researchers tested the intelligence quotients of two groups of children: 2-to-4-year-olds, and 5-to-9-year-olds. They then retested both groups four years later. While the IQ of all small children improves with age, it increased on average five points more for unspanked 2-to-4 year olds, and 2.8 points more for those who had not been spanked in the older group.

The researchers controlled for factors such as parents' socioeconomic level, but acknowledged the only way to make this type of study infallible is to randomly assign children into spanked and unspanked groups -- which wouldn't be ethical.

If they want to test the effect spanking has on adult cognition, we're pretty confident they can find volunteers for the study.