739 p.This PhD dissertation has two main parts. The objective of the first part is to conduct research on the bad reputation of television and of television entertainment in particular, and, at the same time, to enquire into trends, theories, approaches and research models that allow a more positive perspective to the study of both this medium, an the entertaiment genre in particular. Its contributions to public television are also studied. This part consist mainly of documental research. A global, international approach is taken for that, from the pespective of various academic fields and disciplines, among which are sociology, audience and reception studies, cultural and popular culture studies, media effects, psychology, as well as telev...