The article presents some of the results of public opinion polls that were carried out as a part of a panel poll, organized by the «Institut Universitaire de Sondage d'Opinion Publique» and covering 1.500 belgian voters.The article specifically deals with the following items - the meaning of the votes shift between 1971 and 1974 (as far as voting intentions were concerned) ;- the moment at which voting decisions crystallized in the 10-3-74 elections;- the way in which the political climate was perceived, and the predominant cares voters had before the elections;- the impact of certain attitudes on votes shifting: an analysis of these processes (specifically by the latent class approach).