I want to throw in one anecdote about distraction communication and concentration that's sort of a trade off between them, which is that at google every year we have a questionnaire for all our engineers, what do you like what do you not like about your job, what's bothering you and last year the number one question that people liked the most was the quality of the Colleagues and the interactions they had with them and we thought that was a great result and the question that they liked the least was being interrupted by other people. 