Difference between CHILDES Version

[Brian MacWhinney]

Dear Mehmet,
     When you are focusing on the codes in the %mor tier, then the issue is not the version of the corpus or the version of the CLAN programs, but the version of the English MOR grammar that was used.  The various MOR grammars are under continual development to get better accuracy and one of the changes a little over a year ago involved the change of coding of words like “going” from progressive verbs to progressive participles, as in part|go-PROG.  You are righ  that,  you take this change into account, then the numbers should be comparable.

—Brian MacWhinney

On Oct 31, 2013, at 3:23 PM, Mehmet Ali Yatbaz <maliyatbaz at gmail.com> wrote:

> Hi, 
> 
> I'm trying to replicate a paper that uses CHILDES corpora however in the paper they did not give any information related to CHILDES version.
> I compared the statistics of v2.0.1 with the paper and observed
> dramatic differences. For example
> 
> v2.0.1 tags the word "going" as n:gerund in ".. it is going to be possible...".
> however the paper tags going as verb.  If I treat all occurrences of "doing", "going" ..etc as verbs than the statistics become more similar.
> 
> Is this a systematic error of ver2.0.1 or m I missing something?   Is there a way of downloading the older version of CHILDES?
> 
> Best regards.
> 
> 
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