Paid interns received salaries 2 percent higher in the summer of 2012 than they did in 2011, but the rate of increase slowed from the year before, when salaries rose 6.4 percent, according to a new survey by the research and consulting form Intern Bridge. The 2012 Intern Salary Report  found that interns were paid on average $13.50 an hour, up from $13.25 an hour in 2011. Many industries paid less in 2012 than they did the year before, but Robert Shindell, vice president of Intern Bridge, said the losses were likely offset by bigger gains in business and engineering. The majors of students who saw the steepest wage declines were mechanic and repair technicians; science technologies; communications technologies; family and consumer sciences; and area, ethnic, cultural and gender studies. The Department of Labor requires companies who employ interns to either pay them or ensure they receive academic credit.