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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=031223015-15072011>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.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=031223015-15072011>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.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=031223015-15072011>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).</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=031223015-15072011>Philip Dale </SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
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<FONT face=Tahoma size=2><B>From:</B> info-childes@googlegroups.com
[mailto:info-childes@googlegroups.com] <B>On Behalf Of </B>Robin
Campbell<BR><B>Sent:</B> Wednesday, July 13, 2011 11:45 AM<BR><B>To:</B>
info-childes@googlegroups.com<BR><B>Subject:</B> Re: Frequency and AoA
norms<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>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</DIV>
<DIV>simply muddies the waters. And they're pretty muddy by now .
. </DIV><BR>
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