Sleeptalk for children

I think this is in the right place, mods, feel free to move it. :)

Has anyone heard of this? I read an article on it in a free publication my Mum gave me last week. The point of it is to talk to your child when they are in a light sleep, and give them positive reinforcement (from memory like "you will be fit and healthy, not you will enjoy sports at school" kind of thing). It is meant to work on the subconscious learning.

I am thinking of getting the book. In the mean time, trying to catch Steph in a light sleep (hard if Ryan is awake and clingy) and try to encourage some positive behaviour from her (she is truly awful, SO often, and combined with Ryan not sleeping/being able to get into a routine/sleep in his own cot, etc is really doing my head in). And yet, I believe her behaviour at daycare is really good. Arrgghhh! How do I get her to behave for her family? Sometimes she has the most amazing manners, beyond her years, but when she goes the other way, that seems beyond her years too. :( :cry: What should I say to her?