Quick Question on Lexical Diversity Measures

[John Bandman]

 Greetings!

I wanted to be sure that I was understanding correctly that MATTR and MTLD measures are reliable and valid lexical diversity measures while TTR and Voc-D are not as reliable a measure across the varying lengths of texts. 

Could someone please explain why?

Thank you. 

[Scott Crossley]

If you have access, give this a read: https://link.springer.com/article/10.3758/BRM.42.2.381

And Scott Jarvis has done a lot of similar work that will be helpful.

Scott

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Scott Crossley

Professor, Department of Special Education

Data Science Institute | Peabody College

Vanderbilt University

https://www.linguisticanalysistools.org/

https://learlab.org/