MLU giving odd results

[Gordon, Peter]

I just taught a class where students do a simple MLU analysis to get used
to CHILDES.  As I was doing it in class I noticed that the MLUs for Adam
did not look right. His MLU for the first sample was 4.176, despite having
mostly single word utterances.  Any thoughts?

Peter

mlu +tchi childes/Eng-NA/Brown/Adam/*.cha
Wed Oct  9 17:38:29 2024
mlu (29-Oct-2020) is conducting analyses on:
  ONLY dependent tiers matching: %MOR;
****************************************




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>From file <childes/Eng-NA/Brown/Adam/020304.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 1239, morphemes = 5174
	Ratio of morphemes over utterances = 4.176
	Standard deviation = 2.946





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>From file <childes/Eng-NA/Brown/Adam/020318.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 1272, morphemes = 5062
	Ratio of morphemes over utterances = 3.980
	Standard deviation = 2.767





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>From file <childes/Eng-NA/Brown/Adam/020403.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 830, morphemes = 3964
	Ratio of morphemes over utterances = 4.776
	Standard deviation = 3.062





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>From file <childes/Eng-NA/Brown/Adam/020415.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 774, morphemes = 2870
	Ratio of morphemes over utterances = 3.708
	Standard deviation = 2.546





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>From file <childes/Eng-NA/Brown/Adam/020430.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 837, morphemes = 3679
	Ratio of morphemes over utterances = 4.395
	Standard deviation = 3.146





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vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>From file <childes/Eng-NA/Brown/Adam/020512.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 810, morphemes = 3392
	Ratio of morphemes over utterances = 4.188
	Standard deviation = 3.216





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vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>From file <childes/Eng-NA/Brown/Adam/020603.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 849, morphemes = 4548
	Ratio of morphemes over utterances = 5.357
	Standard deviation = 4.005





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vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>From file <childes/Eng-NA/Brown/Adam/020617.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 635, morphemes = 4197
	Ratio of morphemes over utterances = 6.609
	Standard deviation = 4.429





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vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>From file <childes/Eng-NA/Brown/Adam/020701.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 853, morphemes = 4596
	Ratio of morphemes over utterances = 5.388
	Standard deviation = 3.860





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vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>From file <childes/Eng-NA/Brown/Adam/020714.cha>
MLU for Speaker: *CHI:
  MLU (xxx, yyy and www are EXCLUDED from the utterance and morpheme counts):
	Number of: utterances = 912, morphemes = 5096
	Ratio of morphemes over utterances = 5.588
	Standard deviation = 4.284




-- 

Peter Gordon
Pronouns: He/His/Him
Associate Professor
Biobehavioral Sciences and Human Development
Teachers College, Columbia University
525 West 120th Street, Box 306
New York, NY 10027
Email  pgordon at tc.edu |  p: (212) 678-8162

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