Sleep training is one of the most debated topics in parenting โ loaded with strong opinions on all sides. Here is an honest, non-judgmental comparison of every major method, with what the evidence actually says.
Is Sleep Training Safe?
The short answer: yes. Multiple large studies โ including a 2012 study of 326 infants followed to age 6 โ found no negative effects on attachment, behaviour, stress hormones or the parent-child relationship. Sleep training does not cause harm. It does cause crying in the short term, which is a different thing.
Cry It Out (Extinction)
What it is: Put baby down awake at bedtime. Leave the room. Don't return until morning (or a pre-set time). No check-ins.
How long it takes: 1โ3 nights for most babies. It's the fastest method.
Hardest part: The first night. Crying can last 45โ90 minutes. Most parents find this extremely difficult.
Best for: Parents who want it done quickly, can handle the crying, and have a baby over 6 months.
Ferber / Graduated Extinction
What it is: Put baby down awake. Return at increasing intervals (3 min, 5 min, 10 min...) to briefly reassure without picking up. Extend intervals each night.
How long it takes: 3โ7 nights typically.
Hardest part: The check-ins can sometimes make crying worse, not better. Some babies escalate when a parent appears and leaves again.
Best for: Parents who can't do full extinction but want a structured approach.
Sleep Lady Shuffle / Chair Method
What it is: Sit next to baby's crib on night 1. Move the chair progressively further from the crib over 2 weeks until you're out of the room.
How long it takes: 2โ3 weeks โ by far the slowest method.
Hardest part: You're present but not responding, which can be very confusing for young babies.
Best for: Parents who want to be present throughout. Works better for toddlers than young babies.
Fading / No-Cry Methods
What it is: Gradually reduce the amount of help you give โ e.g. rock less each night, feed less, reduce dummy use slowly over weeks.
How long it takes: 4โ8 weeks.
Hardest part: Requires consistency over a long period. Easy to accidentally backslide.
Best for: Parents who genuinely cannot tolerate any crying. Works, but requires patience.
The Honest Bottom Line
All of these methods work. The "best" method is the one you can follow consistently. Inconsistency โ starting Ferber, giving up on night 2, then restarting a week later โ is harder on babies than simply picking one approach and following it through.