Checking emails is the most popular task.
Nielsen Research claims second screen use is becoming commonplace. 88 per cent of Americans used their tablets while viewing TV at least once per month during Q4, while the same applies to 86 per cent of smartphone users.
Meanwhile, 45 per cent claimed second screen use was a daily event, compared to 26 per cent using their devices more than once per day.
Brits are also keen second screen users, with 80 per cent of tablet users watching the box at the same time at least once per month, falling to 78 per cent for smartphone users, while 24 per cent do so more than once daily.
The most common device task was to check emails, either during the ad breaks or during the actual show, while sourcing programme information and looking up advertised products were also popular.
Additionally, Italians and Germans were the least likely to adopt second screening with around a third of tablet and smartphone owners saying they never combine their device with TV viewing.