A psychologist says grandparents may be one of the most powerful—and overlooked—keys to helping kids navigate today’s mental health challenges. Credit: Shutterstock With more than 4 0% of U.S. teenagers reporting ongoing feelings of sadness or hopelessness , one child psychologist believes grandparents may be an important part of the solution. Kenneth Barish, Ph.D., Clinical Professor of Psychology at Weill Cornell Medicine, says the decline of extended family involvement has helped fuel what