Medicion del pluralismo informativo en la TV chilena: propuesta y resultados de aplicacion de un instrumento multidimensional de analisis

The article presents a multidimensional proposal for measuring informative pluralism in different open TV programs: central newscasts, morning shows and opinion and debate programs, as well as the results of its application in Chile. The instrument is composed by 6 dimensions: diversity, editoriality, concentration, ownership, perception and scope. The hypothesis is that an adequate measurement of television pluralism requires different dimensions of analysis, which include aspects of programming, audiences and television as a market. After two pilot tests, the application of the instrument showed as results a low pluralism in the programs analyzed, which is expressed in the homogeneity of content (topics, sources, political parties), in a context of high concentration of the audience and advertising in the channels with the worst score. These findings raise questions and proposals for the public television and the regulatory institutions of the sector in the current scenario of constitutional change.