The idea behind extinction (or full extinction to differentiate it from graduated extinction) is that you want to extinguish the behaviour (crying) by not responding to it. As with the check-and-console method, go through your bedtime routine, put them in their crib awake, say good night and walk out. This is certainly the most controversial sleep-training method, and even experts disagree on what you should do next—it all depends on what stage your baby is at developmentally, as well as what works for the parents.
One of the biggest mistakes parents make, no matter what method they use, is being inconsistent. At some point your little one will cry for you in the middle of the night, even if you think you've all made it over the sleep-training hump. Go to his cribside to check on him and make sure all is well—just be sure not to restart an old sleep crutch during this check. After that, try comforting him from outside the door, if you can. If you regress due to illness or travel, get back on the training wagon as soon as possible. Otherwise you risk sabotaging the weeks of hard work you've already put in.
Sleep training advocates in this category encourage a more gradual approach – soothing the baby to sleep and offering comfort right away when the child cries. Pediatrician William Sears, author of The Baby Sleep Book, is a leading proponent. Parent educator Elizabeth Pantley outlines a step-by-step no tears approach in her book The No-Cry Sleep Solution.
• DIY methods work. Don’t love the rigidity of a particular method? Modify it to suit your own family’s circumstances. Sometimes, a sleep coach can be helpful to come up with modifications that won’t affect the goal of getting baby to sleep through the night, but it’s fine to mix and match until you find a strategy you’re comfortable with. “I don’t think I’ve ever loved and loathed anything as much as I do sleep training. We did it with my son because he was still waking up every three hours at 3.5 months old, and I felt it was more out of habit,” says Margaret, a mom of one. “My husband and I decided that we valued teaching him self-soothing and that in the long run it was worth some short-term effort. I did a ton of research and came up with our own plan—similar to Ferber, but our time limits of letting him fuss weren’t as rigid. It worked, and he’s been a solid sleeper since.”