I only pretend to be agreeable

Thomas Baker MA, of York University and Jacqueline Bichsel PhD, of Pennsylvania State University compared young and older adults with regard to what personality traits predict intelligence.

..."agreeableness was found to have a contrary relationship with general knowledge suggesting that a disagreeable nature may go hand in hand with better vocabulary and knowledge retention in older age," said Baker. This result supports previous research that suggests that those who are highly intelligent may be more aloof and independent.