vocd

[Karin Edlund]

Hi,

I am exploring the VOCD option and my question is if VOCD can be run on main tiers and not just only on %mor line? I have not used %mor in my transcriptions. 

Best regards,

Karin Edlund

[Leonid Spektor]

Yes, VOCD can run on main speaker tiers instead of %mor tiers. Use +o option for that.

Leonid.

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[Karin Edlund]

Hi Leonid,

Thank you for your reply!

I have run an analysis for VOCD on main tier  using the +o option. 

Attached is the output. The speaker in an adult.

I am uncertain how to interpret the output. If possible, I am mostly grateful for help on interpretation.

Is VOCD, even if it is on main tier and not on %mor line, a better way to report lexical diversity than TTR? My transcriptions vary in length from 7-19 minutes.

Best regards,

Karin Edlund

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[Leonid Spektor]

Karin,

I will leave the interpretation of VOCD results to someone more knowledgeable about it than me. I can recommend that you read manual https://talkbank.org/manuals/CLAN.pdf chapter 7.24 VOCD.

Leonid.

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[Zeynep Köylü]

Hi Karin,

The following is the seminal paper by the developers of the D measure of vocabulary diversity (VOCD in CLAN) in comparison to TTR:

Malvern, D., & Richards, B. (2002). Investigating accommodation in language proficiency interviews using a new measure of lexical diversity. Language testing, 19(1), 85-104.

Hope this helps & best wishes,

Zeynep Köylü

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[Brian Macwhinney]

Yes, vocD is better than TTR for reasons described in section 7.24 of the CLAN manual with material derived from the Malvern et al. (2004) book, as provided to us by the authors.

—Brian MacWhinney

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[Nan Bernstein Ratner]

It is very easy to run mor on your data and then vocd. That should make it more accurate.  Mor isn't inserted during transcription?

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[Karin Edlund]

Thank you Leonid, I will study the VOCD section again and in addition the article by McKee.

Best regards,

Karin

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[Karin Edlund]

Thank you Zeynep, I will read your recommended article.

Best regards,

Karin Edlund

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[Karin Edlund]

Thank you Brian, I was a bit confused over the %mor line being included or not. As I have understood it vocD can be analyzed on main tiers.

Best regards,

Karin Edlund

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[Karin Edlund]

Dear Nan,

I have not used %mor in my transcriptions, therefore my question about analyzing vocD on main tiers.

Best regards,

Karin Edlund

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[Nan Bernstein Ratner]

Yes, I understood. No one inserts the %mor line while transcribing; it is inserted using the MOR command. I may have missed why you want to avoid HAVING a %mor tier or using it with VOCD, because it is a 2-second interim step on the way to computing any of the lexical diversity measures that makes them more accurate, since they can then run on lemmas.

N

Nan Bernstein Ratner, F-, H-ASHA, F-AAAS, ABCLD

Professor

Hearing and Speech Sciences

University of Maryland

0100 Lefrak Hall

College Park, MD 20742

nra...@umd.edu, 301-405-4217

Co-director: FluencyBank (www.fluency.talkbank.org);  http://languagefluency.umd.edu/  

President, International Fluency Association (IFA; http://theifa.org)

Director, University of Maryland Autism Research Consortium (UMARC), www.autism.umd.edu

Faculty, Language Science (languagescience.umd.edu; Neuroscience & Cognitive Neuroscience (NACS, nacs.umd.edu), Developmental Science Field Committee

http://hesp.umd.edu/facultyprofile/bernstein%20ratner/nan

My PubMed Bibliography

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[Karin Edlund]

Hi Nan,

I may have expressed myself inaccurately, my sincere apologies. My experiences in this area are somewhat limited.

My main research question concerns conversation and interaction teacher - children (Swedish), where I use my own coding scheme to study different communicative strategies the teacher is using. 

For this I have transcribed on word level, orthographically, yet not included morphological analysis. However, I would like to report some descriptions about the teacher's talk; amount of words spoken and different words spoken. I have been considering if TTR or VOCD is proper to report, but I realize that there is the risk of VOCD being overestimated.

Considering the children, perhaps lexical diversity could be interesting to analyze regarding the child's skills to use for example different verb forms, and not only the lemmas?

Best regards,

Karin

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