Searching the internet for information was the most common activity conducted while watching TV, cited by more than one-quarter of TV viewers. No other activity came close to this level of usage; just 7% or fewer respondents said they used social media to learn more about an episode as they viewed it. Usage immediately after a program remained relatively low for all activities, but skyrocketed as the week went on. One possible reason for this? Avoiding spoilers. Read the rest at eMarketer.