lexical diversity

Lexical diversity refers to the variety of different words used within a particular piece of writing or speech. It measures how rich and varied the vocabulary is, indicating how many unique words are present relative to the total number of words. A text with high lexical diversity uses a wide range of vocabulary, making it more interesting and expressive, whereas a text with low lexical diversity relies on repetition. This concept helps assess language complexity, creativity, and depth in communication or writing.