Especially when it comes to the detailed assessment of television or radio broadcasts, classical surveys have deficits. In a retrospective survey, the participants often forgot many details of what they had seen, but these are particularly interesting for producers, broadcasters or marketers. It is true that special passages can be discussed in group discussions after viewing or listening.
However, through the temporal distance, the social situation in the conversation, or particularly prominent passages (distracting from the rest of the content), the memory of perception at the time of reception can be distorted.
Mobile RTR (real-time response) tools enable ratings to be administered at any location, and the results are immediately available online.