The Presence of One’s Own Smartphone Reduces Available Cognitive Capacity
Results of this kind, which attract "aren't people on their phones a lot these days, and also millennials should stop buying avocado toast"-level Huffington Post columnists, have consistently failed to replicate: <a href="http://dl.acm.org/citation.cfm?id=3048418" rel="nofollow">http://dl.acm.org/citation.cfm?id=3048418</a>