Sleep deprivation => Aggressiveness

Most people know that a lack of sleep can lead to fatigue and confusion, but research that was recently presented at a meeting of the Associated Professional Sleep Societies suggests that it can also cause people to place blame on others, sometimes even leading them to plot revenge.

A team of scientists said that sleep-deprived individuals often engage in "counterfactual thinking," a process by which they displace their aggression on others without taking into account how their own actions may have influenced a negative outcome.

"It may be that the sleepier you are, the more likely your musings are to be angry thoughts about how others could have done better," said principal investigator David Mastin, Ph.D.