The Emotions Profile Index (EPI) questionnaire, based on the theory of emotions, proposed by R. Plutchik and H. Kellerman, is well known and widely used personality inventory. It is attractive because of any easy and fast data-collection procedure and a clear graphical representation of the emotionsprofile. But simultaneously with its diagnostical application some methodological and theoretical doubts about comprehensibility of the structureof EPI arose. In our study we tried to explore two features of the structure of EPI: dimensionality (the hierarchy and exclusiveness of dimensions) and stability (the appurtenance of adjectives to dimensions, comprehensiveness and theoretical denotation of dimensions). The exploratory as well as confirmatory approach was applied. It was shown that eight dimensions are not equivalent regarding generality. The dimension Destruction appeared to be superior to some other dimensions (Rejection, Orientation). Conceptually, some dimensions are not determined distinctly enough. The theoretical definitions of the constructs are not entirely similar to their meaning, which results from the relationship between adjectives and dimensionsin EPI. It seems that dimensions assessed by EPI and contents, whichare supposed to elucidate the profile index of emotions in Plutchik's Theory do not bear completely equivalent information.
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