More extreme methods, such as Marc Weissbluth's extinction method, are often mistakenly referred to as "Ferberization", though they fall outside of the guidelines Ferber recommended  . Some pediatricians,Mistaken Approaches to Night Waking Excerpt from Sweet Dreams: A pediatrician's secrets for your child's good night sleep Lowell House, 22–28 By Paul M. Fleiss, MD, MPH, FAAP, 2000 however, feel that any form of CIO is unnecessary and damaging to a baby.Sears, William MD, et al., The Baby Sleep Book, Little, Brown and Company, 2005
Other CIO methods, such as Marc Weissbluth's extinction method, is often mistakenly referred to as "Ferberization", though they fall outside of the guidelines Ferber recommended . "Ferberization" is referred to as graduated extinction by Weissbluth . Some pediatricians,Mistaken Approaches to Night Waking Excerpt from Sweet Dreams: A pediatrician's secrets for your child's good night sleep Lowell House, 22–28 By Paul M. Fleiss, MD, MPH, FAAP, 2000 however, feel that any form of CIO is unnecessary and damaging to a baby.Sears, William MD, et al., The Baby Sleep Book, Little, Brown and Company, 2005
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. "Ferberization" is referred to as graduated extinction by Weissbluth