CNN Sanjay Gupta MD May 31, 2014 20:51:00
Hugely important. they proved this a little while ago. researchers in germany took two groups of people and gave them a golf ball. first group, they said, here's ball, go put. the second ball they said this ball has been lucky, go do. >> lucky ball. >> who did better? the people who believed they had the lucky ball did much better than the other group and they repeated with other groups. when they believed they had the lucky ball they believed they performed better. >> what about men and women? who's the most guilty at self-deception? >> it's a close call and depends on what you look at. if i ...