近两年,在美国收视率调查市场处于垄断地位的尼尔森公司出现了一些新的变化:通过增加样本户,缩减日记法的测量范围以及推广人员测量仪等,提高调查精度;迎合广告主的需求,引入节目关注度的测量;加强网络电视、手机和“第四屏幕”等媒体监测。尼尔森公司以“任何时间任何地点的媒体测量”作为自己的口号,追踪技术进步所带来的所有视频消费行为。 In the past two years, there have been some new changes in Nielsen companies that have monopolized the market for U.S. ratings surveys: improving the accuracy of surveys by increasing the sample households, reducing the measuring range of diaries, and popularizing personnel gauges; cater to the needs of advertisers , The introduction of program attention measurement; strengthen network television, mobile phones and “fourth screen ” and other media monitoring. Nielsen uses its slogan as “anytime, anywhere media measurement” to track all the video consumption behavior brought about by technological advances.