Digest for chibolts at googlegroups.com - 2 updates in 1 topic

[Jenna Poland]

Thank you so much for your response. I feel like I have a much better
understanding of what is being measured. I decided to go with %_Overlap and
%_Expan for my analysis.

Thank you again!
-Jenna

On Mon, Jan 26, 2015 at 7:00 AM, <chibolts at googlegroups.com> wrote:

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>    -  Questions about CHIP <#14b261d078711dc0_group_thread_0> - 2 Updates
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>   Questions about CHIP
> <http://groups.google.com/group/chibolts/t/dd08a6aec3e02770?utm_source=digest&utm_medium=email>
>   Jenna <jenna08 at gmail.com>: Jan 25 03:14PM -0800
>
> Hello again,
>
> I am using the CHIP utility for a research project. I am interested in
> looking at how much mothers imitate and expand upon child utterances and
> whether that facilitates language development.
>
> I have a few questions about some of the summary measures included in
> CHIP.
> I plan to use %_Overlap and %_EXPAN in my analysis, but I am not sure I
> understand Avg_Dist, Rep_Index, and %_IMITAT. These are the descriptions
> included in the manual:
>
> “$DIST: the distance the response utterance is from the source”
>
> “Avg_Dist: The sum of the DIST values divided by the total number of
> overlapping utterances.”
>
> “Rep_Index: Average proportion of repetition between the source and
> response utterance across all the overlapping responses in the data.”
>
> “%_IMITAT: ?? The numerator is the number of imitations and the
> denominator
> is ???”
>
> My questions are:
>
>
> 1. How is distance measured? Is this how many utterances there are
> between source and response?
> 2. Is the Rep_Index how closely the source and response match (e.g. 3
> out of 4 words match)?
> 3. Does %_IMITAT measure percent of responses that exactly imitate the
> source? What is the denominator?
>
> Any further explanation you could provide on these measures would be very
> helpful. Thank you again for all of your help and for this wonderful
> program!
> Jenna K. Poland
> M.A Speech-Language Pathology Candidate, May 2015
> Graduate Assistant to Nan B. Ratner, Ed.D
> University of Maryland, College Park
>   Brian MacWhinney <macw at cmu.edu>: Jan 25 06:46PM -0500
>
> Dear Jenna,
> Page 68 of the manual explains that the nature of the source and the
> target varies depending on whether the report is in the %chi, %adu, %csr,
> or %asr tier. On page 70, the manual explains that distance refers to
> distance in terms of utterances. Yes, the Rep_Index reflects the number of
> matching words. Regarding %_IMITAT, you might notice that I was a bit
> unclear about this index when I wrote the documentation in the manual and
> so I put question marks. I assume the denominator is the number of
> utterances. If this is important to you, we could set up a large test
> corpus to see exactly what this is doing. There is a chip.cha file in the
> /examples folder that we could extend to check on this.
>
> —Brian MacWhinney
>
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