I've also read about the research on
expressive sign language emerging
around six months, but it was with
hearing children who had been exposed
to both signs and speech. Unfortunately,
I don't have the source for this nor
the time to search for it.
Deaf children exposed to sign language
progress through the same stages and
at they same rate as hearing children
exposed to only speech, and they "babble"
with their hands. The research was done
by Petitto and Marentette of McGill
University in Montréal, Canada.
There are a number of links to articles
on these matters (language acquisition,
sign language and critical periods) at
my web site, which you can find here:
http://homepages.luc.edu/~hweiman/page4psyc.html/#languageacq
--
Heidi Weiman
Ed Psyc Central
Psychoeducational Resource Center
http://EdPsyc.org
[EMAIL PROTECTED]
Also available at:
http://homepages.luc.edu/~hweiman
[EMAIL PROTECTED]
