How often a mother initiates ...

How often a mother initiates a conversation with her child is not predictive of the language outcomes - what matters is, if the infant initiates, whether the mom responds.
 Po Bronson

Quotes from the same author

The important thing to know about playing to win and playing not to lose is that there are actually different neural networks that are being used. It's not very easy to do both at the same time and, if you are trying to have a playing to win mentality, you're going for it, there's some things that trip you up or trigger the wrong neural network. If you start worrying about your mistakes all of a sudden, if you get too focused on the facts and the details, these are going to shift your neural networks and sort of screw up your strategy.
 Po Bronson
There's a powerful transformative effect when you surround yourself with like-minded people. Peer pressure is a great thing when it helps you accomplish your goals instead of distracting you from them.
 Po Bronson
We all make mistakes, but we need to learn from them and move on. You can own a mistake, or the mistake will own you.
 Po Bronson