EN
The author describes the problem of influence of polls on the public opinion. The democratic changes in 1989 were characterized by increasing number of research companies specialising in the surveys (and polls) as a response to the huge social demand. The published researches have influenced decisions and behaviour of voters and politcians, so it is very important to minimise mistakes related to the ill designed and carried out polls. It is possible by taking care of some technical details, but first of all it is important to educate the society in order to get the objective view of the polls. The role played by politicians is very important, but equally important are media, especially television as the main source of information.