Other eye-catching studies that didn't make the final cut this fortnight:
Alcohol causes you to lose your sense of humour.
People with amnesia have trouble imagining the future.
Stroke sufferers who suffer damage to a part of the brain called the insula often lose the urge to smoke, offering clues to addiction.
A brain area has been found that is more easily activated in altruistic people.
If you've come across a fascinating piece of psychology research, please let me know.