In this class, we first learn to use corpus to explore how we understand meanings of each word and how the lexicon is structured in the mind. We then discuss the following issues. 1) In what degree are linguistic categories diverse across different languages? Is there any universality in the way different languages carve up the world?; 2) To what extent does our thought depend on language? ; 3) to what extent is children’s conceptual development shaped by language learning?