Parents watch their children flit from screen to screen and wonder if this generation of kids has any sticking ability. Can they focus on anything for more than two minutes or 140 characters? Do they know how to deal with real people and read real facial expressions and body language? What about paper: would they learn better from it than from screens? Are they warping their brains?In her new book Media Moms & Digital Dads: A Fact-Not-Fear Approach to Parenting in the Digital Age, Yalda T. Uhls wades through all the research and data gathered during this new media surge to answer those questions and many others. Additionally, Uhls, child psychologist scientist and media expert at Common Sense Media, tries to help parents determine whether they should worry and what they should do about the media onslaught.In this excerpt from the book, she focuses on multitasking and the distracted (or not?) teenage learner.