Frequency and AoA norms

[Margaret Fleck]

Out of curiosity, is there (or are there plans to create) an updated version ofthe American English CDI?     
Margaret Fleck


--- On Fri, 7/15/11, Philip Dale <dalep at unm.edu> wrote:

From: Philip Dale <dalep at unm.edu>
Subject: RE: Frequency and AoA norms
To: info-childes at googlegroups.com
Date: Friday, July 15, 2011, 8:34 AM



 
 

 
I agree completely with Robin's first point, the lack 
of validity for adult judgements which are *retrospective* and not tied to 
specific, recent experiences.
I have to disagree on the second point, about age norms 
derived from the CDI. These judgements are made with respect to a *concurrent* 
situation with respect to a specific child. The parent is not making a judgement 
of age of acquisition; simply a yes/no judgement about their own child. The AoA 
comes from aggregating across parents.
There is pretty good agreement between CDI norms and 
information derived from CHILDES transcripts (not that one would expect perfect 
agreement; transcripts often miss low-frequency words). And Goodman et al (2008) 
showed substantial correlation between CDI norms for words and frequency of use 
in parental input (at least  *within* categories).
Philip Dale 



From: info-childes at googlegroups.com 
[mailto:info-childes at googlegroups.com] On Behalf Of Robin 
Campbell
Sent: Wednesday, July 13, 2011 11:45 AM
To: 
info-childes at googlegroups.com
Subject: Re: Frequency and AoA 
norms



The subtext here is that adult-derived norms are no good. I agree. And 
ditto for all that MacArthur CDI stuff. Research based on such adult-derived 
data
simply muddies the waters. And they're pretty muddy by now . 
. 

  



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