In my clinical work with pregnant and postnatal mums experiencing anxiety and mood disorders, few issues are reported as consistently as sleep deprivation. Parents who spend the first year of their child’s life (or longer) waking up regularly throughout the night to attend to their child are, not surprisingly, at a higher risk for depression and anxiety.
It’s therefore understandable that parents want to know what can be done to help babies to sleep through the night. And with that interest comes strong opinions, best-selling books and even a “baby whisperer”, as it seems whispering is no longer just for horses.
In the midst of this clamour of advice is a good deal of controversy on a sleep technique for babies known as controlled crying. Advocates claim it saved their baby’s sleep and their sanity. Critics liken it to “normalised abuse” and claim it can cause lasting psychological damage.
We need to start where very few critiques on the topic have started – with a definition of what controlled crying is, and what it is not.
Controlled crying (also known as controlled comforting) is when parents respond to their infant’s cries and gently comfort them, then return at increasing time intervals to assist the infant to self-settle while knowing that the parent is still there. The key words there are respond and return.
The recommended implementation of such a technique is after six months of age. By Piaget’s theory of object permanence, this is the developmental stage when babies understand that an object (in this case the parent) still exists even when it is out of sight.

Controlled crying is not “extinction”. The extinction method is a dramatically-termed technique which refers to leaving a baby to “cry it out”. For example, when the infant cries at night, the parent shuts the door to the nursery and does not respond at all. The idea is that eventually the baby will understand that the parent is not returning and will self-settle.
In terms of controlled crying (not extinction), Australian researchers found that when mothers of infants aged six to 12 months used one of two interventions (controlled crying and “camping out”, where parents remain in the room while the infant returns to sleep before quietly leaving), not only was there a significant improvement in infants’ sleep, there was also a significant reduction in maternal depressive symptoms compared with controls.
The research team followed up these mothers and infants at the age of six years, and found no difference in emotional or behavioural problems, sleep problems, attachment, parenting styles or maternal mental health between intervention and control groups.
Despite it being clear that extinction techniques were not used in this study, there was considerable controversy about these findings. A letter to the British Medical Journal (BMJ) where the original paper was published even compared the study to research conducted in Nazi Germany under Hitler.
More recently, critics of controlled crying such as Pinky McKay and Margot Sunderland have drawn attention to the long-term ill effects of controlled crying. Ms McKay notes that babies who are left to cry are at risk of sensory deprivation and potentially long-lasting brain damage induced by early trauma, similar to what we know in psychological research as learned helplessness.
These critics are supported by a position paper against the use of controlled crying from the Australian Association for Infant Mental Health (AAIMH); however, this position paper has not been updated in almost ten years and explicitly notes that its reference list does not include any studies on the impact of controlled crying on infants.

The evidence from both animal and human studies is very clear that severe stress such as emotional neglect and abuse in infancy does indeed induce long-lasting changes in the developing brain. And I can see the link between extinction techniques and emotional neglect.
But it’s extreme to compare controlled crying, where the parent responds and returns, to emotional neglect such as that suffered by infants raised in Romanian orphanages. This confusion between extinction and controlled crying appears to be at the heart of the criticisms.
At the end of the day (literally), each family needs to work out what the best technique is to get their infant to sleep. Techniques such as controlled crying and camping out might help some families, but others will be very uncomfortable at the idea of not responding immediately to their infant.
Every baby is different, and suggesting there is one magic solution that will work for all babies, or that what worked for them will work for everyone, is not only misleading, but also confusing and distressing for mothers desperately seeking an answer and some sleep.
There’s a wealth of mums, whisperers, angels, and child health nurses out there – listen to their advice and work out the right solution for you and your family.
Andrew Whitehouse
Winthrop Professor, Telethon Institute for Child Health Research at University of Western Australia
Great article, Monique.
Gary Fry
logged in via Twitter
Whilst I follow and like your thinking in terms of training (approximation and so on), I can't not muse upon humans being the only primate which locks its young away.
A good article.
Trish Donovan
logged in via Twitter
Improved sleep, reduction in maternal depression. Win-win.
Tim Scanlon
Debunker
Can't wait for the six month mark then!
Miranda Buck
logged in via Facebook
"The enemy of trusted journalism is spin and PR. Make a donation to help protect our independence and support evidence-based analysis, research and news."
And you recommending that women listen to Tizzy Hall? Who has no qualifications, uses no evidence in her work and recommends some dangerous infant sleep practices. What about Elizabeth Pantley or Bill Sears?
Euan Ritchie
Lecturer in ecology at Deakin University
Why do we overthink these things? What does evolution and logic tell us about how mothers (and fathers) and young would have interacted, and perhaps they still should? Couldn't agree more with Gary (below), why do we see humans as so different to others animals with respect to parental care? Just for the record we have a 19 month who barely sleeps and a 5 year old who didn't sleep until ~2, so this topic is very close to home.
Sue Ieraci
Public hospital clinician
"why do we see humans as so different to others animals with respect to parental care?"
Let's see....'cos other animals don't blog about it?
I don't support the sort of zealotry that has tired parents feeling guilty for "not doing it right". ON the other hand, though, there;s not a lot of point to looking to less developed societies unless we want to take off nappies and have babies run around pant-less, and throw out our smart-phones. You can raise children perfectly well without having to revert to the paleolithic - either in diet or habit.
This is a highly recommended comment.
Euan Ritchie
Lecturer in ecology at Deakin University
Hi Sue,
My intention is not to make tired parents feel guilty, my wife and I are in that boat presently, as are many of our friends, and to use quotations saying "not doing it right" is your interpretation, not my words. Please make this clear. However, at the risk of being blunt (again, my intention is not to offend) may I ask three questions:
Read more1. If you were crying or upset, would you like it if your friend/partner/someone, came over and patted you on the back etc and then left again, you then…
Sue Ieraci
Public hospital clinician
Hi, Euan - I apologise if the second part of my comment appeared to refer to you - my intent was to respond to your question, then make general comments. My comments about guilt for young parents were aimed at general influences in our priveleged societies, which seems to make parenting a competitive sport, with winners and losers.
Now, I will respond to your questions.
How would I feel if I was comforted in the way you describe? I'd feel like I was being treated like a newborn. The techniques…
Read morePaul Richards
strategic foresight
Euan Ritchie wrote:"not to make tired parents feel guilty, my wife and I are in that boat presently, as are many of our friends, and to use quotations saying "not doing it right" is your interpretation, not my words." So true, projecting our values onto others is a great risk when explaining our values.
Read moreStill commenters mean well even while putting their quantified values first. Stick with what you are doing, controlled crying is not the definitive answer fro everyone. You both actually know what…
david henry
Electrician
I agree with Euan, there is a need for a constant connection between an adult and an infant.
The umbilical cord is the perfect example. i don't know how parents can sleep at night after cutting the umbilical cord, cruelly cutting off the newborns oxygen supply and effectively suffocating the baby. This cruel act then forces the baby to have to breathe for themselves a torment noone should have to face.
And don't get me started on the birth, being squashed through a tiny hole, from a warm and safe place out into the cold harsh world, risking strangulation and infection along the way. It should be outlawed.
Regards,
President of the parents against birth and breathing babies
Blake Blake
Professional
I agree with David Henry, there is one group of people who we should all ignore in these discussions, those who don't have the intellectual capacity and maturity to actually listen to what someone is saying and respond, but are so lazy and inept they have to hide behind satire, irony and exaggeration, which paints the persons views as ridiculously extreme, so extreme that if you actually said it without straight you would rightly sound like a crackpot.
And I particularly agree with David's view that yes, this does demonstrate that the person is trying to ensure they have a cop out if someone actually points out the stupidity of what they said.
And finally, thanks David, I definitely agree this is a key indicator of someone trying to avoid actually applying any effort to thinking.
Caroline Bailey
logged in via Facebook
It's certainly good to clarify the difference between extinction and controlled crying. These are some questions and issues I'd have liked this article to address:
Read more- how are parents told to comfort their babies when returning to the room? Are they allowed to pick them up? Or just pat, or just shush? My understanding of an infant's primal need includes being held closely...LOTS! Hence why baby wearing is so soothing for most babies.
- given object permanence kicks in at 6m, then presumably…
Kirsti Abbott
Lecturer, Scientific Practice & Communication
Caroline (& Euan),
I couldn't agree with you more. Babies have not evolved sleep patterns or needs at the same rate our culture has evolved and modified our expectations of babies. Parenting will never be a 7am-7pm job, and is it perhaps not a function of our cultural expectations of mothers to be "on top of things", constantly achieving, organised, well-dressed, happy, loving and committed to ourselves rather than the raising of our children who are, I hate to break it to some people, 100% dependent…
Read moreSue Ieraci
Public hospital clinician
"Humans might do well accepting their taxonomic classification in the biological world and parent accordingly."
I would be cautious about returning to a mammalian lifestyle, Kirsti - which would involve not just baby-wearing but also sheltering in caves or holes, only eating what you can catch or scavenge, walking everywhere, and not commenting on blogs about it.
Humans have the lifestyle and longevity we have because we don't feel bound by our "taxonomic classification". Reject our difference if you will - it has certainly had an impact on other life on earth - but infant sleeping is only a miniscule part of it.
Ida MacTier
logged in via Facebook
A critique of the study cited in this opinion piece: http://evolutionaryparenting.com/a-not-so-blind-review-of-the-recent-cio-research/
Laura Coulter
Practitioner
Do I need to delcare my "opinion" before making a comment (?) - if so: I am neither pro or anti anything much: I see far more damage being done (and profits being made) from the business and public health communities promulgating certain techniques (with dire threat of terrible consequences) and equating "good parenting" with the application of any given technique. My position is - very strongly and unapologetically - that good parenting is not about doing certain things it is about the quality of…
Read moreLydia Isokangas
Student in Finland
I commend the author on writing this article, even though I didn't follow through on this technique with my three children who are now all in their teens and have been sleeping through the night without my help since they were 2 years old. Its still important that parents who cannot continue having interrupted nights for almost a whole year can try something else to regain some semblance of normality.
The only cautionary tale I have of using this technique is my own experience of trying it…
Read moreSimon Brown
Simon Brown is a Friend of The Conversation.
Clinical Academic (Medical)
It is a great article and I liked the last paragraphs, having just experienced child number 4 (now 9 months). My already slightly hazy sleep-deprived memories are of trying various things- a mixture of approaches depending on how he was behaving.
Sometimes he needs a cuddle, sometimes rocking (and singing works a treat!), sometimes he wants to be left alone (gets irritated if we hold him and goes straight to sleep if we lie him down!) and sometimes we let him scream for 3 or so minutes at a…
Read moreSue Ieraci
Public hospital clinician
Well put, Simon. No single answer, children differ, they grow out of it, your family has to survive, lots of causes of crying etc etc etc.
In the midst of this, sage advice from the article author - it you choose this method of settling called "controlled crying", in the context of loving and nurturing your baby, it won't do any harm.
Lucy Miller
Research officer
Monique,
Why on earth did you link to the website of Tizzie Hall? I don't think you have any right to be linking to this website when desperate parents might be reading your article for advice.
Have you read her (disgraceful) book 'Save our Sleep'? In it, she offers a case study of a 1-year-old child who gets extremely distressed at bedtime, screams until he vomits and, in her view, 'deliberately defecates' in his nappy in order to avoid going to bed.
Her advice is to leave him (yep…
Read moreMonique Robinson
Associate Principal Investigator, Telethon Institute for Child Health Research at University of Western Australia
Hi Lucy (and Meredith, above)
Thank you for your comments. The link was put there merely as an example of someone who calls herself a 'whisperer', and not to endorse or condone her advice. I have no relationship with Tizzie Hall. My advice in this piece is that families see what advice is out there, and then decide on the strategy that best suits them. There is a lot of advice out there (Tresillian is one example for those in NSW, and there are similar organisations in other states) and it is important that families understand every baby is different and keep seeking advice and support until they find their way through. I do encourage you to take up your issue with the Save our Sleep book with the publisher as I am sure your feedback can help to inform subsequent print runs if they occur.
Kind regards,
Monique
Judith Olney
Ms
Having had my daughter at a very young age, when there was very little help at all for mothers, except the local baby health clinic nurse, I sometimes think I was better off than many parents today.
As a young single teenage mum, I just did what I thought was best, I asked older mothers for advice, and just got on with the job. Today I would be accused of all sorts of neglect, but at the time there was little I could do about it.
I remember when my daughter would cry non-stop for hours, and…
Read moreSue Ieraci
Public hospital clinician
Well-put, Judith. I am told that young mothers may be less prone to post-natal depression because they don't expect to have absolute control over every detail, but are happy to "go with the flow".
We have constructed pregnancy, birth and parenthood into some sort of contest where only the most dedicated martyrs win.
Judith Olney
Ms
Hi Sue, there wasn't much information around about post-natal depression when I had my daughter, so I don't know whether young mothers may be more or less prone to this illness. Maybe there is more diagnosis of this illness today because of more awareness, or maybe there is more post-natal depression because of the expectations and constant monitoring we apply to pregnant women today, causing more anxiety which may lead to depression. It would be interesting to see a study on this issue.
There is so much pressure on pregnant women, and parents, that I wonder if this has a detrimental effect on both the parents and the children.
Euan Ritchie
Lecturer in ecology at Deakin University
I'm not sure it's about 'dedicated martyrs' or who 'wins' Sue, last time I checked nobody received a medal or certificate for their parenting, nor should we. The unconditional love of a child is reward enough. I think what many are concerned about though is the justification of parenting methods which would seem to fly in the face of the best science (most of which is not referred to in the article above), our evolutionary history (which is still well and truly relevant), but most importantly, logic…
Read moreNatalie Hudson
mother & prenatal yoga teacher
No one disputes the sheer exhaustion and shock that comes with having babies and small children but ethically there is a question about how we “teach” them to sleep via leaving to cry….my observation as a mother (and I have two young children who I have never left to cry on their own to sleep) is our society is deluded and obsessed with forcing the independence of sleep on our young when biologically they are designed to sleep close to us - it's a fact we far too often choose to ignore.
The…
Read moreEuan Ritchie
Lecturer in ecology at Deakin University
Could not agree more, well put. Some truths are inconvenient...
Gary Fry
logged in via Twitter
Well put indeed.