The following is a quote from a chapter on signing in a recently published parenting book issued by the American Academy of Pediatrics, Heading Home with your Newborn (2011):
This endorsement is also referenced in a recent Momformation blog entitled "Baby Signing Develops Language" by Dr. Lisa Dana on the Momformation blog - here's the link: http://blogs.babycenter.com/mom_stories/baby-signing-promotes-infant-development/