80% of American mobile users multitask in front of the TV

"While 80% of mobile users multitask in front of TV, 70% say they multitask once a week, and 49% on a daily basis. More than 60% percent check their phones at least “once or twice” during a show with 15% active on their devices the entire time.
– 38% say their mobile activity enhances the broadcast, while another 38% say it’s distracting.
– The top 5 categories that attract multitaskers are reality shows, news, comedy, sports and food.
– 94% of mobile multitaskers communicate while watching TV, while 60% are looking up content. Of the communicators, the most popular activities in order are: texting, talking, email, social networking and IM.
– 44% of the content that multitaskers consume is unrelated to what’s on TV compared to 38% that’s related. 36% look up information about a commercial they just saw. Most multitasking activity, overall, happens during commercial breaks."
Source:  Research from Razorfish & Yahoo, reported by LostRemote, 10th November 2011
The original article is here.  There's no mention of the methodology, but since all shows referred to are Aerican, I'm assuming the study took place in the US.