Winona Ryder is nervous about her new movie "Girl, Interrupted." The actress, 28, told The New York Times that she has invested more of herself in this role than in any other because of a personal connection. (The film, based on Susanna Kaysen's memoir of a two-year stay as a teenager in a psychiatric clinic, opens Dec. 21.) Ryder briefly checked herself into a hospital at age 20 for treatment of depression, something she never discussed publicly before. "I was overworked and overtired -- too tired to sleep," she told The Times. "The worst part of it was not being able to describe it -- the overwhelming horror of the anxiety attacks -- even to my own family, to the people closest to me."