Megan Gilligan Estrangement Study (IMAGE) Iowa State University Caption Iowa State researcher Megan Gilligan says estrangement between a mother and adult child is more common than people might think. Credit Christopher Gannon, Iowa 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.