(without a smartphone)
"What is striking is that simply being alone with their thoughts was apparently so aversive that it drove many participants to self-administer an electric shock that they had earlier said they would pay to avoid," the scientists write in Science.
http://www.theguardian.com/science/2014/jul/03/electric-shock-preferable-to-thinking-says-study
(without a smartphone)
"What is striking is that simply being alone with their thoughts was apparently so aversive that it drove many participants to self-administer an electric shock that they had earlier said they would pay to avoid," the scientists write in Science.