B.b.c. World Service this is James Fletcher With been quiet this week why can t we stop looking at our phones if you own a smartphone you ve probably got a story like this I still cannot stop from just hovering my finger and clicking to press my numbers suggest we re spending a lot of time on our phones average young adult 60 times a day for a total of about 220 minutes we ll hear how a famous psychologist discovered a key principle of what makes things compelling it boils down in plain English to not knowing how much you re going to get and not knowing when it s going to come and how technology design is used to draw us to our screens there s at least 100 people on the other side of the screen whose job is to figure out how to get you to use the product as much as possible but seem quite after the news. Live from n.p.r. News in Washington Stevens President Trump has named Army Lieutenant h.r. McMaster as his new national security adviser David Rothkopf who s editor in chief of Foreig