Analisi secondo l'Extended Logistic Model (ELM). Un Contributo di studio della versione italiana delle scale Internal, Powerful Others, Chance della Levenson

In this paper the items of the Internal, Powerfu lothers, Chance scales are examined according to the latent trait theory. Data obtained from the application of the IPC Scales to 123 subjects aged betwwen 17 and 20 years, are elaborated on the basis of an extension of the Simple Logistic Model: the Extended Logistic Model. The results have evidenced 1 item for the Internal Scale, and 1 item for the Powerful Others scale which are not consistent within the specific dimension and therefore they have been eliminated, a version of the Scale of 22 items is proposed, which shows to be strictly coherent with the extended model