As you settle (11) ____ in front of your television, have you (12) _____ wondered how TV ratings are calculated? Don't worry, we're not (13) _____ watched while we're in front of the TV. It’s the Audience Research Board (ARB) that works (14)______ the ratings for each programme. To (15)______ this, the board appoints researchers whose task is to choose from a sample of viewers, who receive a small payment for (16) _____ cooperation. To gather the required information, the researchers connect the viewer’s TV set and video recorder to electronic meters which record when these appliances are turned on and off and what is being viewed. There is a difference (17)_____ counting TV programmes and those recorded on video. To count the latter, the day, time and channel are im printed by the electronic meter. (18)____ , only when the video is watched does the programme recorder on the meter become activated. It sounds complicated but the ARB need to separate live recordings (19) ______ taped ones. (20) _____ problem is the number of viewers in one household. If there is (21) _____ than one viewer, then the household is given a special remote control. Finally, (22) _____ all the figures are collected, they are compared to the TV guides and (23) ____ the end the national viewing figures are calculated.