EN
Drawing on the previous literature offering three possible approaches to form convictions concerning the determinants of human nature, three questionnaires have been developed. The questionnaires were tested in a series of studies (N= 447, age range: 19-60 years). Each questionnaire comprised 8 statements and the statements were all followed by 7-point answer scales. The reliability of the questionnaires - Cronbach's alfa - varied (from.80 to.63) and so did the correlation of individual scales items with the overall results (from.76 to.38). The statistical analysis presented in the article demonstrates that the questionnaires measure three independent convictions concerning the determinants of human nature, i.e.: the belief in the domination of natural factors, the belief in the domination of nurture, the belief in the interaction of nature and nurture.