Oh well, at least there's hope for the young: Why the Aging Mind Is Driven to Distraction - Los Angeles Times: "Scientists from King's College at the University of London, for example, recently determined that people trying to juggle phone calls, e-mail and other routine office distractions suffered a greater loss of IQ than someone smoking marijuana. Grady, however, suggested that people in their 20s today their brains molded by instant messaging and all of the other high-technology of the short attention span may be better able to manage unwarranted interruptions when they reach old age.'If you are a 20-year-old today,' Grady said, 'you may find it easier to deal with distraction when you are 60 because you have had so much practice.' "
This of course raise an interesting questioning: what is the total drop in IQ points of someone smoking weed at work? Or does one lead to the other?