I have often worried about what I am doing to my children’s psyches by allowing them to cry a little bit as they learn to sleep through the night. That said, I know what it does to their psyches to have a deranged, sleep deprived mother, and I think that it is worth it. Plus, my anecdotal evidence tells me that the better my children sleep the happier, calmer and smarter they seem to be. I am glad to have some scientific evidence to back me up — it turns out that the cortisol levels are actually lower in children who have uninterrupted sleep, so we are doing them a huge favor by weaning them from sleep props and night waking habits.