... cooccurrence-based, and dictionary-based methods, and two kinds of sim-ilarity, taxonomic similarity and associative sim-ilarity. Word vectors constructed by these meth-ods are compared in the performance of ... the performance of two tasks,i.e., multiple-choice synonym test and word asso-ciation, which measure the degree to which theyreflect these two kinds of similarity.2 Two Kinds of SimilarityIn ... asthe dimension of the vectors increased as in thecase of synonym judgment, the scores of bothLSA-based and cooccurrence-based vectors hada peak around 200 dimensions, as Landauer and Dumais (1997)...