I re-read the sticky on controlled crying in this forum, and it mentioned not using controlled crying until the baby is at an age where it understands that the parent will come back. I also read on the ABA website that a baby doesn't have "object permanence" until at least 8 months old.. ie as far as a baby younger than that is concerned, it's been put down and forgotten. It's not until they're older that they grasp the concept that the carer will return. That's the part that really snapped me out of any controlled crying ideas that have crept into my head. So I'm mainly against it being used with young babies. I won't consider it an option until my baby is at least a toddler, THEN he'll have the ability to "learn" to sleep, knowing that I am just in the next room if he needs me.