Predicative Adjectives: An Unsupervised Criterion to Extract Subjective Adjectives

Michael Wiegand, Josef Ruppenhofer and Dietrich Klakow

We examine predicative adjectives as an unsupervised criterion to extract subjective adjectives. We do not only compare this criterion with a weakly supervised extraction method but also with gradable adjectives, i.e. another highly subjective subset of adjectives that can be extracted in an unsupervised fashion. In order to prove the robustness of this extraction method, we will evaluate the extraction with the help of two different state-of-the-art sentiment lexicons (as a gold standard).