In one experiment, some people read a passage from Francis Crick, the molecular biologist, asserting that free will is a quaint old notion no longer taken seriously by intellectuals, especially not psychologists and neuroscientists. Afterward, when compared with a control group that read a different passage from Crick (who died in 2004) these people expressed more skepticism about free will — and promptly cut themselves some moral slack while taking a math test.
Well, Crick also cut himself some moral slack when it came to using Rosalind Franklin's purloined photo of a DNA molecule.
See also what Bryan has to say: Free Will.(Hat tip, Dave Lull.)