Here is some information on sign language:
We have full signing conversations :lol:. He's actually really good at it and picks up new signs having only seen them a couple of times.
I always say the words I am signing in hope that one day he'll say words too and not just "uh" the syllables lol. I really wish I'd got on the baby signing thing earlier with him as he's so good at it
Anybody else lose speech when they get into signing? I've had to repeatedly pack away our dvds that do signs because he'll completely stop using the words - words he knows *well* - and if you don't know the signs you're screwed. For months. But I keep trying so that I can let my youngest watch them since there's concerns about his speech and initially they were great for getting Patrick to associate words with an object.
Maybe it's an autism thing but I know it's always been harder to get him to *keep* his words than learn them. But he's so fast at picking up signing and certain other non-verbal communications.
Sorry that I am just responding now.
As far as research goes, children should not be negatively effected by the use of sign lang. I don't have a source to share though. If I find anything, I'll let you.