The Ferber method: An evidence-based guide to "cry it out" sleep training

© 2008 - 2017 Gwen Dewar, Ph.D., all rights reserved

The Ferber method, also known as "graduated extinction," is perhaps the most well-known sleep training program for children.

It is also one of the most controversial, primarily because the method involves a degree of "crying it out."

In a series of training sessions, parents leave their children alone for strictly-timed intervals, ignoring their children’s protests and cries. When the method works, kids gradually accept that no one will come to their aid, and, as a result, their behavior becomes less disruptive (Reid at al 1999).

If you're considering sleep training for your child, this article will help you decide if graduated extinction is right for you. Here I discuss the following:

  • When is the method inappropriate, and what key questions remain unanswered?
  • How does graduated extinction work?
  • What are the arguments for and against graduated extinction?
  • What are the "gentler" alternatives, and how do they measure up?

As I explain below, other methods of sleep training - methods that do not involve leaving babies alone to cry -- have been tested and judged effective. Desperate, tired parents have more than one option.

Precautions and limitations:
What can the experts agree about?

Although Ferber sleep training is controversial, researchers agree on many points.

1. The Ferber method is not appropriate for young babies

Young babies need to feed at night, and their sleep-wake patterns are still immature. For these reasons, even researchers who advocate Ferber sleep training warn that sleep training is inappropriate for babies under 6 months old (France and Blampied 1999; Owens et al 1999).

Instead, parents can try out a number of safe, age-appropriate tactics for improving their babies' sleep. For more information, see these articles on infant sleep problems and infant sleep aids.

2. The Ferber method is NOT appropriate for kids who have a conditioned fear of being left alone in their beds or who have a conditioned vomiting response

2. The Ferber method is not appropriate for children who have a conditioned fear of being left alone or who have a conditioned vomiting response

Common sense suggests that traumatized kids should not be subjected to graduated extinction, and advocates of Ferber sleep training agree. If past experiences have taught your child to fear being left alone in his crib or bed—and/or to respond to separation by vomiting—you should consult with a behavioral psychologist about the most appropriate approach to sleep training (France and Blampied 1999).

3. The Ferber method is not appropriate as a treatment for most child sleep problems

When parents consider sleep training, it’s usually because their children are experiencing bedtime problems and/or disruptive night wakings. The Ferber method seems like a possible solution. But is it?

Graduated extinction is designed for one, narrow purpose: To get children to fall asleep without parental soothing. Judged on this basis, the method is effective (see "Arguments in favor of the Ferber method," below).

But the Ferber method is NOT designed to treat most of the sleep problems that cause bedtime battles and night wakings. For instance, the Ferber method doesn’t address

If one of these conditions is responsible for your child's bedtime problems or night wakings, it's important to find appropriate treatment. Otherwise, you risk worsening your child’s psychological problems or ignoring potentially dangerous medical conditions.

On the positive side, you might find that treating these conditions renders sleep training unnecessary. For instance, if your child resists bedtime because he isn't sleepy, treating a circadian rhythm disorder or adjusting his bedtime may solve the problem altogether.

For help identifying—and treating—your child's sleep troubles, see these articles on bedtime problems, night wakings, and nighttime fears.

4. The Ferber method does not teach children how to fall asleep

As Richard Ferber himself acknowledges, graduated extinction doesn't teach children how to fall asleep on their own (Ferber 2006). Children are simply denied access to their parents, and left to work it out for themselves.

If you really want to help your child fall asleep, try this alternative to the Ferber method—a sleep training program known as "positive routines with faded bedtime." Unlike Ferber sleep training, the "positive routines" program will teach your child how to relax and prepare for bed (Adams and Rickert 1989).

You can also help your child fall sleep by following these practices:

  • Dim the lights in the evening
  • Avoid exercise and stimulating activities before bedtime
  • Avoid stimulants (like caffeine) and hard-to-digest foods before bedtime
  • Help your child cope with nighttime fears

Don't intervene the moment you hear a sound. As noted in my articles about newborns and older infants, babies often sigh, jerk, or vocalize during sleep. You don't want to wake a sleeping baby by mistake, and even if your baby is awakening, she may go back to sleep spontaneously if you give her the chance.

5. Studies leave key questions unanswered

Researchers agree that babies under the age of 6 months should not undergo graduated extinction training. But what about older babies? Are there any risks or long-term side-effects?

Advocates of graduated extinction training note that no studies yet have demonstrated that the Ferber method harms children over 6 months old. But the truth is we lack well-designed, controlled studies to resolve these questions.

In some cases, the problem is that no research exists. For instance, studies of  human infants confirm that crying is physiologically stressful—increasing a baby’s blood pressure, heart rate, and cortisol levels (Levesque et al 2000; Luddington-Hoe et al 2002). Do the intensified crying bouts—the so-called "extinction bursts"—associated with the Ferber method put babies at any risk? No one yet has tested this hypothesis.

In other cases, studies have been published, but these studies aren't designed in ways that permit us to answer our questions. To see what I mean, consider the following.

Testing graduated extinction: Crucial criteria for investigating long-term effects

A well-designed experimental study isolates those variables that concern us, and contrasts them with a control condition that doesn't include those variables.

In this case, one of the key areas for concern is leaving a crying infant in a setting where the baby can't see, hear, or otherwise detect the presence of a caregiver.

As noted below, this feature of the Ferber method stands in stark contrast with the cross-cultural and evolutionary norm for infant care, which is for babies to fall asleep in the comforting presence of caregivers.

Does this divergence from the species norm change the way children develop?

To find out, we need an experiment that contrasts infant isolation with its natural counterpart: babies going to bed with the awareness that their caregivers are present (i.e., in the same room) and responsive (i.e., ready to attend, rather than ignore, infants that become distressed).

We also need to take care that other factors are held constant. This includes baseline characteristics, like stressors in the home, but it also includes changes introduced during the experiment.

For instance, if parents in one group receive special instruction in how to time feedings for optimal sleep, the same training should be given to parents in the other condition. Otherwise, we won't be able to tease apart causation. We won't know which aspects of the experimental manipulation (learning about timed feedings, or practicing the Ferber Method?) affected the outcome.

Finally, we need to address crucial aspects of quality control. Did all parents in the treatment condition follow the same procedures? If some families dropped out of the study, do we know how this might have biased the results?

Have the researchers devised objective measures for determining long-term outcomes (like the development of emotional regulation, personality, and attachment security)?

How large is the study, and what kind of families participated? Can we generalize the results to other populations -- including people in different cultures?

It's a lot to think about, but it's necessary if we want to address questions relevant to the debate. Unfortunately, as I note below, no study yet has met the first criterion (contrasting graduated extinction with species-normal nighttime care), let alone all of them. So despite decades of research, we still know surprisingly little about how the key features of graduated extinction might influence a child’s behavior, development, and family relationships.

How the Ferber method works

The Ferber method is actually a variant of a sleep training program called "extinction."

Extinction sleep training is based on the assumption that children have sleep problems because they have learned to depend on parental soothing to put them to sleep. Whenever kids are denied this parental soothing, they may stall, plead, cry, or throw tantrums to delay bedtime. Because they can’t fall asleep by themselves, kids will also be disruptive if they awaken during the night.

Parents who "give in" to their children’s demands for attention are reinforcing the problem behaviors. So the solution is for parents to put their children to bed (while they are still awake) and then leave them alone. If kids cry, parents are instructed to ignore it. Parents aren't supposed to check on the child again unless it seems absolutely necessary (Owens et al 1999).

The Ferber method departs from extinction training in one key respect: It permits parents to check on their children—but only briefly and according to a strict schedule. On the first night of training, parents put their child to bed and then stay away for 3 minutes. After a brief check (during which the parents take care not to pick up or hold the child) the parents leave again—this time for 5 minutes. Subsequently, parents wait 10 minutes between visits until the child finally falls asleep.

For each night that follows, parents gradually increase the time between checks. For instance, on the second night, parents might wait 5 minutes before the first visit, 10 minutes before the second, and 12 minutes before all subsequent visits. On subsequent nights, these intervals might stretch to 20 minutes or more.

Some parents who try Ferber sleep training see improvements within a few days. In studies testing graduated extinction, parents may complete training within 4 weeks (e.g., Reid et al 1999).

But some parents—disturbed by the notion of ignoring their children, and concerned about the potentially harmful effects of training—drop out before they see any improvements in their children's behavior. Kids subjected to the Ferber method may become much more distressed during training than they were before. These so-called "extinction bursts"--which include more frequent and intense crying, protests, and tantrums—persuade some parents to give up.

In addition, training may fail if parents are inconsistent and periodically "give in" to their children's pleas. Ferber advises parents to stick to the routine, even if the child becomes so upset that he vomits. In this event, parents should clean up the mess quickly and then leave the room and continue training (Ferber 2006).

Arguments in favor of the Ferber method

According to scientific studies, extinction sleep training--including Ferber sleep training--is associated with the following positive outcomes (Mindell et al 2006):

  • Children who complete training are less likely to throw bedtime tantrums
  • Children who complete training are more likely to settle down at night within ten minutes
  • Children who complete training are less likely to awaken their parents during the night
  • Parents who complete training report improvements in their own stress levels, mood, and interactions with their children

In addition to these positive results, parents have reported improvements in their childrens' daytime behavior, perhaps because sleep training "graduates" were getting more sleep at night (Mindell et al 2006).

For parents enduring nights of sleeplessness and emotional turmoil, these outcomes are extremely important. Advocates of graduated extinction out that parents who are sleep-deprived are at higher risk for depression and marital conflict (Mindell et al 2006). Such parents may develop negative feeling toward their children and the parent-child relationship suffers as a result. If parents can stop or reduce their children's disruptive nighttime behavior, the whole family will benefit.

But the Ferber method isn't the only sleep training program that delivers these benefits.

As noted below, alternatives to the Ferber method -- training programs that don't involve leaving children alone to "cry it out"-- have similar track records (e.g., Skulladotir et al 2003; Matthey and Črnčec. 2012). For this reason, it's important to consider the potential costs of graduated extinction.

Arguments against the Ferber method

Although studies show that extinction sleep training can be very effective in eliminating bedtime protests and stalling tactics, many people worry about potential side effects.

Leaving children alone to cry seems to violate our deepest instincts, and no wonder.

For most of human history, our ancestors ' biggest sleep problem was almost certainly the avoidance of predators. Like modern-day hunter-gatherers, our ancestors slept communally and shared "watch" duties (Worthman and Melby 2002). Children snuggled up to their parents and siblings. If children cried out, it was important to soothe them quickly.

Moreover, it was important for babies to forge close, personal ties to their caregivers. They required care and feeding for many years before they could survive on their own. In a world where 40% of children died before their 15th birthdays (Kaplan et al 2000), success depended on having somebody looking out for you -- somebody who understood your needs and was committed to meeting them. No wavering. No neglect.

So ignoring an infant's distress was a sign that something was wrong. And leaving a child alone would have constituted abandonment, if not attempted infanticide (Hrdy 2009). It therefore shouldn't surprise us if our ancestors evolved emotional and behavioral responses to keep parents and children close.

Our evolutionary past has left its stamp in our brains. When young children are left alone at night, they may experience one of the most primal and powerful stressors known to young animals--separation anxiety (Panksepp 2000). Separation anxiety is a panic response arising from a primitive part of brain that also processes information about physical pain (Panksepp 2000).

What happens when we ignore this response? And what happens when parents act as if they are insensitive to their children's distress? How does the Ferber method affect the stress response system? The development of attachment relationships, emotional skills, and personality traits?

These questions concern a broad array of parents, pediatricians, researchers, and therapists (e.g., Sears and Sears 1996; Commons and Miller 1998; Sunderland 2006). And, as noted above, we need more research to answer these questions. Currently we lack studies that meet our design criteria.

For example, one study -- highly touted in the popular media -- tracked outcomes for more than 250 Australian infants over a period of 5 years (Hiscock et al 2007; Price at al 2012).

That sounds very promising, but there is a problem.

This study didn't test the specific effects of the Ferber method.

Parents participating in the intervention were taught many things. They learned about infant sleep patterns, and ways to improve sleep by tweaking the timing of meals. They were advised to put babies to bed while they were still awake, and they were provided with a nurse to coach them in their efforts. Then parents were encouraged to choose one of two sleep training programs -- graduated extinction, and an alternative approach that didn't involve leaving babies alone.

Thus, the treatment condition amounted to a mixed bag. Parents got education, support, and coaching in a number of tactics, not just the Ferber method.

What about the control group? Parents assigned to the control condition weren't encouraged by an assigned nurse to select a sleep training program. But parents in the control condition were free to solicit advice from their regular medical providers, and they were free to adopt any nighttime strategies they wished.

Did some parents in the control condition attempt graduated extinction?

We don't know because the researchers didn't collect information about this.

But every parent in this study was recruited because she had complaints about her infant's sleep. And control-group parents didn't just seek advice from their regular medical providers. Almost two-thirds of them said they had received help and advice from outside sources. It wouldn't be surprising, then, if some babies in the control group received Ferber-style sleep training.

So this study doesn't permit us to evaluate the long-term effects of graduated extinction.

The treatment condition includes several different strategies lumped together, including many tactics that don't involve leaving babies alone. Moreover, babies in the control group probably experienced some of the same training conditions that babies in the treatment group experienced.  What this study really tested was the effects of offering parents a package of education and support.

What about more recent research?

Another group of investigators in Australia have applied a tighter focus to sleep training research (Grandisar et al 2016). They assigned some families to use graduated extinction, and contrasted the results with those of families assigned either to (1) a control condition, or (2) to a group practicing an alternative sleep strategy.

But once again, a lack of information prevents us from making inferences. The researchers didn't collect data on what techniques parents in the control group used to get their babies to sleep. Nor did they ask if babies slept in the same room with their parents, or somewhere else (Grandisar personal communication). Likewise, researchers didn't collect data on sleep location for babies assigned to use the alternative sleep strategy.

As a result, one of the variables of greatest concern to critics -- whether or not babies were left to cry alone -- was therefore left uncontrolled and untested.

In addition, this study suffers from limitations related to small sample size and missing data. No more than 15 families were assigned to each condition, and many families failed to participate at certain points in the study.

For example, at the 3-month data collection time point, only about half the families checked in. The researchers filled in missing data with their own estimates (Grandisar, personal communication).

Missing data can have a big impact, particularly when we're dealing with a small sample size to begin with. You can appreciate this if you consider a test the researchers conducted at the end of the study, 12 months after the start.

Only 7 out of 13 (54%) of families in the graduated extinction group had babies that were scored as securely attached to their parents. By contrast, babies in the control group fared a bit better: 5 out of 8 babies (63%) were scored as securely attached.

That might look bad for graduated extinction, but notice fewer families in the control group actually participated in the test. If nobody had opted out of the attachment test, would the results have looked different?

So this research doesn't target key questions about graduated extinction, and it's limited by small sample size and missing data. As I write this in the spring of 2017, we are still waiting for studies that can provide us with strong inferences about the long-term effects of leaving babies alone and deliberately ignoring their cries. 

The Ferber method compared: How does it measure up against the alternatives?

The Ferber method is not the only option for parents interested in sleep training. Two alternatives include

  • "Positive Routines with Faded Bedtime," and
  • "Extinction with Parental Presence," (in which parents remain in the same room with children until they fall asleep)

The "positive routines" method teaches children how to fall asleep by pacing them through a series of relaxing bedtime rituals--but only when the child is already showing signs of drowsiness. "Extinction with parental presence" is a variant of graduated extinction that doesn’t involve leaving children alone.

(For a step-by-step account of these methods, see my article on “gentle" sleep training.)

How does the Ferber method stack up against these two alternatives?

In the only controlled, randomized scientific study to compare graduated extinction and "positive routines" head-to-head, there were no significant differences in treatment outcomes for kids (Adams and Rickert 1989). Similarly, an experiment pitting graduated extinction against "extinction with parental presence" found no difference in treatment outcomes (Matthey and Črnčec 2012).

According to the American Academy of Sleep Medicine, these three methods "appear to be on a level playing ground" (Mindell et al 2006: 1269).

The bottom line

The Ferber method can be an effective way to reduce nocturnal crying, protests, and requests for parental soothing. But it’s not the only effective method available.

Before you choose a sleep training program, review these points:

  • Make sure that the sleep training program is age-appropriate
  • Screen and address your child’s specific sleep problems
  • Consider your child’s individual temperament and personality
  • If your child has a conditioned fear of being alone or shows signs of conditioned vomiting, consult a behavioral therapist
  • Before training begins, make sure that all participating adults understand the procedure. Regardless of the method you choose, success depends on being consistent.


References: The Ferber methods and its alternatives

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Commons ML and Miller PM 1998. Emotional learning in infants: A cross-cultural examination. Paper presented at the American Association for the Advancement of Science, Philadelphia, PA, February, 1998.

Eckerberg B. 2004. Treatment of sleep problems in families with young children: effects of treatment on family well-being. Acta Paediatr ;93:126-134.

Ferber R. 2006. Solving your child’s sleep problems: New, revised, and expanded edition. New York: Fireside.

France KG. 1992. Behavior characteristics and security in sleep disturbed infants treated with extinction. J Pediat Psychol 17: 467-475.

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Grandisar M, Jackson K, Spurrier NJ, Gibson J, Whitham J, Sved Williams A, Dolby R, Kennaway DJ. 2016. Behavioral Interventions for Infant Sleep Problems: A Randomized Controlled Trial. Pediatrics 137(6).

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Luddington-Hoe SM, Cong X, and Hashemi F. 2002. Infant crying: nature, physiologic consequences, and select interventions. Neonatal Network 21(2): 29-36.

Matthey and Črnčec. 2012. Comparison of two strategies to improve infant sleep problems, and associated impacts on maternal experience, mood and infant emotional health: a single case replication design study. Early Hum Dev. 88(6):437-42.

Mindell JA, Kuhn B, Lewin DS, Meltzer LJ, Sadeh A and the American Academy of Sleep Medicine. 2006. Behavioral treatment of bedtime problems and night wakings in infants and young children. Sleep 29: 1263-1281.

Owens JL, France KG, and Wiggs L. 1999. Behavioural and cognitive-behavioural interventions for sleep disorders in infants and children: A review. Sleep Medicine Reviews 3(4): 281-302.

Panksepp J. 2001. Affective Neuroscience: The Foundations of Human and Animal Emotions. New York: Oxford University Press. Reid MJ, Walter AB, and O’Leary SG. Treatment of young children’s bedtime refusal and nighttime wakings: A comparison of “standard" and graduated ignoring procedures. Journal of Abnormal Child Psychology 27: 5-16.

Price AMH, Wake M, Epi GD, Ukoumunne OC, Hiscock H, Epi GD. 2012. Five-Year Follow-up of Harms and Benefits of Behavioral Infant Sleep Intervention: Randomized Trial. Pediatrics 130(4):643-51.(doi: 10.1542/peds.2011-3467)

Sadeh A. 1994. Assessment of intervention for infant night waking: Parental reports and activity-based home monitoring. J Consult Clin Psychol 62(1):63-8.

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