This one.

“ The fight-or-flight response, also called the fright, fight or flight response, hyperarousal or the acute stress response, was first described by Walter Cannon in 1915. His theory states that animals react to threats with a general discharge of the sympathetic nervous system, priming the animal for fighting or fleeing. ”

“ [...] Challenges to the ethos of multitasking have begun to emerge. Numerous studies have shown the sometimes-fatal danger of using cell phones and other electronic devices while driving, for example, and several states have now made that particular form of multitasking illegal. In the business world, where concerns about time-management are perennial, warnings about workplace distractions spawned by a multitasking culture are on the rise. In 2005, the BBC reported on a research study, funded by Hewlett-Packard and conducted by the Institute of Psychiatry at the University of London, that found, "Workers distracted by e-mail and phone calls suffer a fall in IQ more than twice that found in marijuana smokers." The psychologist who led the study called this new "infomania" a serious threat to workplace productivity. One of the Harvard Business Review's "Breakthrough Ideas” for 2007 was Linda Stone’s notion of "continuous partial attention," which might be understood as a subspecies of multitasking: using mobile computing power and the Internet, we are "constantly scanning for opportunities and staying on top of contacts, events, and activities in an effort to miss nothing. ”