The study found that ‘technological distraction’—just getting emails and calls—caused a drop in the workers’ IQ by an average of ten points. To give you a sense of how big that is: in the short term, that’s the same knock to your IQ that you get when you smoke cannabis. So this suggests, in terms of being able to get your work done, you’d be better off getting stoned at your desk than checking your texts and Facebook messages a lot.