So what is watching television? A dictionary definition would suggest looking at it attentively over a period of time. According to industry measurement standards it’s simply being in a room with a set switched on. That hardly suggests a high level of attention. Watching television requires a lot of complex cognitive processing, but most programmes are redundantly overloaded with information, so it’s often enough just to listen and occasionally look up. We tend to hear television as much as watch. Television is often background entertainment. That explains why people have generally done other things while watching, whether reading or knitting, eating, talking, or playing with their smartphone or tablet. How much television is actually actively viewed? Does the level of engagement increase when programmes are personally selected for viewing on demand and does this affect the sort of shows that people choose to watch?