Research by psychologist Dr Glenn Wilson found that workers who were constantly distracted by phone calls and emails experienced a 10% drop in their IQ.
A recent survey by the University of California estimates that we are bombarded with 34gb of information a day, twice as much as 30 years ago. Office workers, meanwhile, are interrupted on average every three minutes. Small surprise, therefore, that our concentration spans are shrivelling. "The internet has made us very fragmented in our way of working," says Harriet Griffey, journalist and author of The Art of Concentration. "The digital generation considers constant interruptions normal and these days we expect to multitask, which spreads concentration very thin and can be counterproductive."