Morphological relations for the automatic expansion of Italian sentiment lexicons

This paper introduces a morphological method for the expansion of Italian Sentiment Lexicons. The purpose of the work is to exploit the existing resources of Nooj in order to make unknown words automatically inherit the semantic information associated to the known items, tanks to derivation phenomena. The research did not focused only on the propagation of the semantic tags, but explored also the reversion, the intensification and the weakening of the words by the effect of special kinds of morphemes.