I also have found that how we talk to our babies has a lot to dowith their development and intelligence. Even though a baby can't put words to it's thoughts, it thinks in images. To talk "baby talk" non stop inhibits their development, whereas to speak in your regular language (whatever language you speak) gives them a better chance at being able to communicate their needs, feelings, etc. "Baby talk" is merely the child's inability to form words yet, and it helps them if we respond in kind to a point, but also teach them the correct words as early as possible.