Two Motivations (image) Duke University Share Print E-Mail Caption Two motivations -- your policy positions and your social identity -- compete to shape which candidate you choose and whether you will vote, according to a new set of predictions by Duke University scientists. Policy positions are a rational way to decide: pick a president whose policies align more closely with your own. Social identity is what your vote means for your own self-image and how others see you. Credit Duke University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.