The fact is that the theory is a closed model, finished, not allowing no type of complementation. A hypothesis, in contrast, is an opened, always unfinished system and allowing alterations. On this conceptualization HOHLFELDT (2008) it affirms that: Thus, to a hypothesis if it cannot never add an adjective that characterizes an imperfection: a hypothesis is always an experience, a to be proven way and that, if eventually not to give certain in that one specific situation, does not invalidate the theoretical perspective necessarily (p.189). Amongst some implications of the agendamento hypothesis, HOHLFELDT detaches: ) The continuous flow of information; b) The medias, for consequence, influence on the not short-term receiver, as good part of the old theories estimated, but yes the medium and long run and c) the medias, even so are not capable to impose what to think about relation to one definitive subject, are capable of, the medium and long run, to influence on what to think and to speak, what as Hohlfeldt motivates the baptism of this hypothesis of work. In my opinion, these inherent implications to the agendamento detached by it, corroborate what WOLF (2003) called Study of the effect in the long run, that is, the effect of the notice in the construction of the social reality are felt by the addressees in the long run.

This hypothesis was established in form of research for Maswell E. McCombs and Donald L. Shaw in the end of the decade of 1960. It became the central formularization for a study in reduced scale of the reporter concerning the presidential campaign of 1968 in the United States and of as the people had perceived the importance of the problems in game. In the occasion McCombs and Donald they had made an analysis of content concerning as the television, periodicals and magazines presented the reporter politician regarding the candidates and of the points in debate during a period of extensive time.