Zhenmei Zhang, Michigan State University (IMAGE) Michigan State University Caption A study led by Michigan State University sociologist Zhenmei Zhang found that socioeconomics play a significant role in why blacks face a much higher risk of developing cognitive impairment than whites. Credit Michigan State University Usage Restrictions None License Licensed content 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.