Did you know our attention span has shrunk from 2.5 minutes to just 47 seconds in recent years? Gloria Mark, PhD, Chancellor's Professor Department of Informatics in the Donald Bren School of Information and Computer Sciences at the University of California, Irvine, author of âAttention Span: A Groundbreaking Way to Restore Balance, Happiness and Productivityâ reveals the hidden cost of our digital distractions, and what you can do about it.