A new book says our attention spans are shrinking, and it’s not hard to imagine why. In today’s fast-paced world of information overload, we’re constantly flooded with emails, text messages and meetings.

According to Joseph McCormack, author of “BRIEF: Making a Bigger Impact by Saying Less,” the average professional receives 304 emails every week, checks her smartphone 150 times per a day and spends 28 hours each week reading and responding to emails.