Contextual Discriminability of Antonymy and Similarity of Adjectives Big, Little, Large, and Small

Contextual discriminability of similarity and antonymy of unmarked and marked adjectives (big, little, large, small) was analyzed.  Discriminability increased but decreased in proximity for antonymy versus similarity, and discriminability optimized for unmarked adjectives in antonymy and similarity. The data supported a model of lexical antonymy and conceptual similarity of adjectives.