I’m actually glad I’ve found out the exact term for using multiple media forms at the same time – watching TV, surfing the internet, and checking your phone, for example: it’s called ‘media-stacking’, and is “most prevalent among 18 to 24-year-olds, as 76% of respondents in that age group regularly browse the Internet while watching television”. I know plenty of people who are outside that age group who media-stack though. It’s definitely a disease that spreads 😉
Scott’s Vocab in the New York Times has more here.