Up until the 1970s, most educators believed that learning two languages at once would confuse children and slow their cognitive growth. But science disagreed with these convictions, said York University psychology Professor Ellen Bialystok in Scienceline July 29. The advent of neuroimaging technology (specifically the CAT scan) in the 1970s granted scientists a new way to investigate how different brains process language. But the emerging evidence wasn’t the only reason bilinguals seemed smarter; Americans’ changing attitudes played a big part, Bialystok said. Read full story.