K.W.
I do not know anything about the NCSS, but I thought that the purpose of all of the various sleep-training methods was to teach your child how to fall to sleep on their own. I'm not sure how you can teach a child this if they're always sleeping in the bed right next to you. I'm not criticizing your choice to co-sleep, just questioning how well any sleep-training method can truly be effective while co-sleeping. Also, there is a minimum age requirement for most sleep-training methods. I personally used the Ferber method with wonderful success and I know the minimum age for this method was 6 months. 4 1/2 months old seems a little young to expect a consistent, predictable routine. My suggestion is to give your daughter a little more time to get older before implementing a serious sleep-training method. In the meantime, take advantage of the fact that you only have one child and sleep when she sleeps!