Description: People who are conscientious and prone to "doing the right thing" are less likely to develop Alzheimer's disease as they age, according to a long-running study of Catholic nuns, priests and brothers. "It's a broad-based trait that is particularly about impulse control, self-discipline and delayed gratification," said Robert S. Wilson, professor of neuropsychology at the Rush University Medical Center in Chicago and lead author of a report in the October Archives of General Psychiatry.