In advance of National Coffee Day, study shows that scientists/lab technicians top the list of those who are less productive in their workday without coffee; Nearly one half of all workers claim they are less productive without coffee PRNewswire September 28, 2011 CANTON, Mass. and CHICAGO , Sept. 28, 2011 /PRNewswire/ -- National Coffee Day is Thursday, September 29 , and according to a new survey commissioned jointly by Dunkin' Donuts and CareerBuilder®, scientists/lab technicians are the professions that need coffee the most, followed by marketing/public relations and education administrators. The survey results also show that coffee plays a major role in helping professionals perk up at work, as 34 percent need coffee to get through their workday, and 46 percent of those who drink coffee claim they are less productive without a cup of Joe. For the second year in a row, Dunkin' Donuts, the national leading quick service retailer of hot brewed/flavore...