Sleep Training Methods: Which One Is Right for Your Family?
Every method compared side by side - what the research actually says, when not to start, and a step-by-step guide to beginning Ferber.
Methods Overview
All evidence-based sleep training methods share one goal: teaching a baby to fall asleep independently at the start of sleep, so they can re-settle themselves between sleep cycles without needing a parent. The methods differ in how much crying is involved and how quickly parents respond.
| Method | Minimum Age | Crying Level | Speed |
|---|---|---|---|
| Extinction (CIO) | 6 months | High initially | Fast (3-7 days) |
| Ferber (graduated extinction) | 6 months | Moderate | Fast-moderate (5-10 days) |
| Chair method (camping out) | 6 months | Low-moderate | Slow (2-4 weeks) |
| Pick-up-put-down (PUPD) | 4-6 months | Low-moderate | Slow and variable |
| Fading (gradual withdrawal) | Any age | Very low | Slow (4-6 weeks) |
| No-cry approaches (Pantley) | Any age | Very low | Very slow (weeks to months) |
What the Research Actually Says About CIO
The question parents worry about most: does CIO cause lasting harm? The short answer from the current body of evidence is: no, it does not. Multiple large studies have examined this:
Price et al. (2012), Pediatrics: Compared graduated extinction and bedtime fading to a control group at 5 years old. Found no differences in child emotional and behavioural outcomes, cortisol levels, or parent-child attachment.
Gradisar et al. (2016), Pediatrics: Compared graduated extinction and fading to control. Both methods reduced night waking. No difference in cortisol, emotional, or attachment measures at follow-up.
The caveat: all these studies were done on babies 6 months and older in stable home environments with responsive parents. CIO is not appropriate for every situation - see the next section.
When NOT to Start Sleep Training
Pause sleep training if:
- - Baby is unwell or just recovered from illness
- - You are in the middle of a developmental leap
- - Travel is coming up within 2 weeks
- - There has been a significant life change (moving, new helper)
- - Baby is under 4-6 months old
Do not start if:
- - Baby has a medical condition affecting sleep (reflux, OSA)
- - You are not able to be consistent for at least 2 weeks
- - Both caregivers are not aligned on the plan
- - Baby has not had a recent growth check
Singapore-specific note: helper and HDB factors
If you have a domestic helper who usually puts baby to sleep, they must follow the same plan - otherwise you will get no results. Brief them clearly, in writing if needed. For HDB: if you live in close quarters with extended family who will intervene, have an honest conversation first. One person going in to comfort during a Ferber check is usually fine; multiple different people responding inconsistently is not.
How to Begin: Step-by-Step Ferber Method
The Ferber method (graduated extinction) is the most studied and commonly used approach. Here is how to do it:
Step 1 - Before you start
Ensure baby is healthy, at least 6 months old, and gaining weight well. Set a consistent bedtime (usually 7-8pm). Run a simple 20-30 minute bedtime routine ending in the cot awake.
Step 2 - The check-in intervals (Ferber's chart)
Night 1: check in after 3 min, then 5 min, then 10 min intervals. Night 2: 5, 10, 12 min. Night 3: 10, 12, 15 min. Night 4+: 12, 15, 17 min. Check-ins should be brief (under 1 minute), verbal only or light pat - do not pick up.
Step 3 - Night waking
Apply the same check-in intervals when baby wakes during the night. If you are still night feeding, feed at planned times only (discuss with paediatrician), then use the chart for settling after.
Step 4 - What to expect
Most families see significant improvement by night 4-5. Night 2 or 3 is often the hardest. If there is no improvement after 10-14 nights, something else may be at play - consult your polyclinic or a certified sleep consultant.