Calculating speech rate with Kideval?

[Julie]

Hello, 
I am a speech language pathology graduate student at University of 
Maryland. For my master's thesis, I am looking at voice onset time in 
speech to infants and to adults. One factor which is known to effect VOT is 
speech rate, so I am looking for a way to calculate this using a program in 
Clan. I noticed that when I ran Kideval, the output included columns for 
"Dur Words", "Dur Utts", "Dur Time (sec)", "Words/Time", and "Utts/Time". I 
was wondering if anyone could explain what is going into each of these 
columns, and how they are each being calculated. I am assuming "Dur Time 
(sec)" is the total time in seconds of all the bullets for a particular 
tier, and that Words/Time and Utts/Time are just the total number of 
words/utterances divided by the total time. I cannot figure out was "Dur 
Words" and "Dur Utts" contains. 

My other concern is that in the transcripts I am using there are often long 
periods of silence or activity with no talking that have been coded as MOT: 
0 [=! silence] or MOT: 0 [=! moving toys], etc. My question is, will these 
bullets be included in the total duration for the mother? If so, is there a 
way to exclude them? I would guess maybe the easiest thing to do would be 
to just change the tier name since I am only concerned with the mother's 
speech rate. 

If anyone has used kideval for rate calculations before and has any input, 
I would really appreciate it! 

Thank you, 
Julie Sampson

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