VOCD manual

[Amanda Owen Van Horne]

Also see 

Owen, A. J., & Leonard, L. B. (2002). Lexical Diversity in the Spontaneous 
Speech of Children With Specific Language ImpairmentApplication of D.*Journal 
of Speech, Language, and Hearing Research*, *45*(5), 927-937.  
Bottom line is that VOCD is better than TTR, but less transparent.  It does 
still vary with sample size, but to a lesser degree. 

McCarthy, P. M., & Jarvis, S. (2010). MTLD, vocd-D, and HD-D: A validation 
study of sophisticated approaches to lexical diversity assessment. *Behavior 
research methods*, *42*(2), 381-392.
Compares various methods of computing D.  Recommends  a variety of 
measures. 

Koizumi, R. (2012). Relationships between text length and lexical diversity 
measures: can we use short texts of less than 100 tokens. *Vocabulary 
Learning and Instruction*, *1*(1), 60-69.
Recommends MLTD



On Wednesday, August 19, 2015 at 9:46:58 AM UTC-5, Amber wrote:
>
> In fact, perhaps I should just post my question on here. The CHAT manual 
> talks about calculating D and states that it can be done on samples as 
> small as 50 tokens. However, reliability is less good for small samples. 
> Could anyone advise me on whether VOCD is still a more valid measure than 
> TTR, even for small transcripts (e.g., during a shared-book reading 
> session)? I assume that as long as the sample is large enough for KIDEVAL 
> to be able to give me VOCD values then it is OK?
> Thanks
> Amber
>
> On Wednesday, 19 August 2015 15:36:05 UTC+1, Amber wrote:
>>
>> Dear all
>>
>> The CLAN manual contains the following link, which no longer appears to 
>> work. 
>>
>> http://childes.psy.cmu.edu/manuals/vocd.doc
>>
>> Is there a new link to the VOCD manual/another similar article? 
>>
>> Many thanks
>> Amber
>>
>>

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