“收视率不等值现象”是电视受众调查经常会发生的一种方法论执行偏差的现象。除了众所用知的统计学合理误差(即所谓的“信心指数”) 导致的不等值结果之外,通常还会发生一些人为的不等值现象：不同调查公司的数据不等值(例如：CSM 和 A．C．Nielson 的同一个收视点未必等值)。不同调查方式的数据不等值(例如：日记法调查与 peoplemeter 调查法的数据就有很大差异)。 “Phenomenon of inequality of ratings” is a phenomenon of deviation of the implementation of methodology in television survey. In addition to the unequal results resulting from the well-known statistically reasonable errors (so-called “confidence indices”), there are often some artificial inequalities: data from different survey firms are not equivalent (for example, The same viewpoints of CSM and A.C. Nielson may not be equivalent). Data from different surveys are not equivalent (for example, the data from diary surveys and peoplemeter surveys vary widely).