Download or read book Lexical Diversity and Language Development written by David Malvern and published by Palgrave Macmillan. This book was released on 2004-09-04 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vocabulary richness, including lexical diversity and use of rare words, has an important role in assessing proficiency, diagnosing progress and testing theory in the study of language development. This book first reviews different methods for quantifying how vocabulary is deployed in spontaneous speech and writing, and then introduces an alternative approach which can assess overall lexical diversity, measure morphology development and compare the development of different word classes. The new approach is illustrated by its application to first and second language learners.