Too Long; Didn't Read
A study in 2014 suggested that simply the presence of your phone nearby can be a distraction if you are trying to focus on studying or work. University of Texas researchers concluded that the “mere presence” of a cell phone may be sufficiently distracting to produce diminished attention and deficits in task-performance, especially for tasks with greater attentional and cognitive demands. The same “brain drain” applies to any potential distractor even when they aren’t actively distracting us. The biggest offenders of I can think of in most technology companies are email, chat, and other instant communication channels.