Ferber Method vs Cry It Out (CIO)
Ferber method vs cry it out (extinction) compared on speed, emotional impact, how they work, and what the research says about sleep training safety.
Feature Comparison
| Feature | Winner | Why It Matters |
|---|---|---|
| Speed of Results | Cry It Out (CIO) | True CIO (extinction method) typically resolves faster — 3–5 nights — because check-ins in Ferber can sometimes prolong crying by re-stimulating the baby. |
| Parental Emotional Difficulty | Ferber Method | Ferber's check-in schedule provides parents with structured touchpoints that reduce anxiety. Pure CIO requires staying out entirely, which most parents find harder emotionally. |
| Flexibility | Ferber Method | Ferber's timed-interval approach is easier to adapt — intervals can be shortened for more sensitive babies. CIO is all-or-nothing. |
| Long-Term Sleep Outcomes | Tie | Multiple studies show equivalent long-term outcomes for both methods. Neither causes measurable harm to attachment, behavior, or cortisol levels at 5-year follow-up. |
| Baby Stress During Training | Tie | Research (Middlemiss 2012; Price 2012) shows similar cortisol patterns in both. Regardless of method, cortisol normalizes quickly once sleep is established. |
| Ease of Implementation | Cry It Out (CIO) | CIO has one rule: put baby down awake, don't return until morning. Ferber requires tracking intervals and maintaining a specific protocol. |
| Works for Most Temperaments | Ferber Method | Some babies become more upset by check-ins (Ferber). Others need the reassurance. Ferber can be adjusted; CIO cannot. |
| Research Support | Tie | Both are among the most studied sleep training methods. The AAP acknowledges both as safe and effective for healthy infants over 6 months. |
Pros & Cons
Ferber Method
- Structured check-ins reduce parental anxiety
- More gradualist approach — adjustable for sensitive babies
- Widely documented and studied since 1985
- Intervals can be shortened for gentler approach
- Some babies become more upset when parent leaves after a check-in
- Slower than pure CIO in some cases due to re-stimulation
- Requires careful timing and consistency
Cry It Out (CIO)
- Fastest method for most babies (3–5 nights)
- Simpler protocol — no intervals to track
- Baby learns self-soothing without re-stimulation from check-ins
- Equivalent long-term outcomes to gentler methods
- Most emotionally difficult for parents
- No flexibility — any check-in effectively restarts the method
- Not suitable for babies who vomit from crying or who escalate without limit
Both Ferber and CIO are safe, evidence-based sleep training methods with equivalent long-term outcomes. The right choice depends on your baby's temperament and your emotional capacity. Ferber works better for babies who respond well to check-ins and parents who need structured touchpoints. CIO works faster for many babies but requires parents to be ready to stay out. Both methods, done consistently, typically resolve within a week.
How to Use This Comparison to Make Your Decision
Comparisons like this one are meant to help you understand the tradeoffs between two options, not to hand you a single universally "correct" answer — the right choice usually depends on your specific circumstances, budget, health situation, and personal preferences, all of which vary from family to family. It can help to start with the feature comparison and pros-and-cons sections above, note which points matter most to your particular situation, and weigh those more heavily than the ones that don’t apply to you. For decisions with any medical dimension, it’s also worth bringing your specific circumstances to your provider — they can weigh in on how the general tradeoffs described here apply to your health history, your pregnancy, or your baby specifically, which a general comparison like this one can’t account for. Many families also find that the "right" choice isn’t permanent — it’s common to start with one option and switch to the other later if circumstances change, and doing so isn’t a sign the original decision was wrong. It also helps to remember that a comparison covers general patterns across many families, while your day-to-day experience will be shaped by details specific to you — your household routine, your support system, and your baby’s individual temperament — none of which a general comparison can fully anticipate.
Questions Worth Asking Yourself Before Deciding
A few general questions tend to help clarify which option fits your situation best, regardless of which two things you’re comparing:
- Which factors in this comparison actually apply to my situation, versus ones that sound important but wouldn’t really change my day-to-day experience?
- Is cost a limiting factor, and if so, does one option have a meaningfully lower total cost once ongoing expenses are included, not just the upfront price?
- Does either option have a specific safety, medical, or developmental consideration that applies to my situation and should be discussed with a provider first?
- How much does convenience matter to me day-to-day, and which option better fits my actual routine rather than an idealized one?
- Am I choosing based on what worked for someone else, or based on what fits my own family’s needs and constraints?
- If I choose one option and it doesn’t work out, how easy is it to switch to the other later?
- Have I asked people I trust — a partner, a friend who’s been through this, or my provider — for their perspective, rather than deciding in isolation?
- Am I under time pressure to decide right now, or is this a choice I can revisit once I have more information or experience?
There’s rarely a wrong answer between two well-established, commonly used options — the goal of working through these questions is simply to make sure the choice you land on is the one that actually fits your circumstances, not just the one that seems more popular or most talked about.
Practical Next Steps
Once you have a general sense of which option feels right, a few practical steps can help before you fully commit:
- If possible, try a small quantity or a short trial period before buying or committing at scale — this is especially useful for products where fit, comfort, or a baby’s individual reaction can vary.
- Read a handful of recent reviews from other parents, keeping in mind that individual experiences can vary widely and a single negative review doesn’t necessarily apply to your situation.
- Check whether your specific circumstances (insurance coverage, local availability, your baby’s age or stage) affect which option is realistic for you right now.
- If the decision has a safety or medical dimension, confirm your plan with your provider before finalizing it, particularly if your situation differs from a typical, low-risk case.
- Give yourself permission to revisit the decision later — most choices in this category are adjustable as your circumstances, budget, or baby’s needs change over time.
Comparisons are most useful as a starting point for a conversation — with a partner, a provider, or simply with yourself — rather than as a final verdict to follow without adapting it to your own situation.
Frequently Asked Questions
No — multiple large studies show no measurable harm from sleep training. A 2016 randomized controlled trial (Price et al.) found no differences in cortisol, attachment, or behavioral outcomes at 5 years between sleep-trained and non-sleep-trained babies. Pediatric sleep specialists, the AAP, and pediatric psychologists widely support sleep training for infants over 6 months.
The Ferber method (graduated extinction) involves putting baby to bed awake and returning at progressively longer timed intervals to offer brief verbal reassurance. Cry it out (full extinction) involves putting baby to bed awake and not returning until morning. Both allow the baby to cry and self-settle — the difference is whether parents check in.
Most pediatric sleep specialists recommend waiting until 4–6 months at minimum (adjusted age for premature babies). The AAP recommends 6 months. Before 4 months, night waking is developmentally normal and nutritionally necessary. By 6 months, most healthy babies can go longer stretches without feeding overnight.
This is relatively common and not dangerous. If your baby vomits, go in, calmly and quietly clean them up, and put them back down awake. Do this as neutrally as possible without extended interaction. Some babies vomit once and never again; for others it may take a few nights. It doesn't mean you should stop — it resolves as night waking resolves.
Yes — the 'Sleep Lady Shuffle' and 'Fading' methods involve more gradual parental withdrawal. Chair method involves sitting progressively further from the crib over several weeks. These methods typically take longer (2–6 weeks vs 3–7 days) but involve less crying. The AAP endorses any evidence-based approach that is safe and consistent.
Usually not in an absolute sense — most comparisons like this one involve two well-established, commonly used options, each with genuine advantages depending on the situation. "Better" almost always means "better for a particular family, in a particular situation," rather than a universal ranking that applies to everyone.
In most cases, yes. Very few decisions in pregnancy and early parenting are truly permanent — plenty of families start with one approach and change course once they see how it actually works for their child or their routine. If you’re unsure whether switching is appropriate for your specific situation, it’s worth checking with your provider.
Cost is a legitimate and important factor for many families, and it’s reasonable to weigh it alongside — not necessarily below — other considerations like convenience or personal preference. When cost differs significantly between two options, it’s worth calculating the total cost over time (not just the upfront price) before deciding, since ongoing costs can sometimes outweigh an initial savings.
If the comparison has any medical, safety, or developmental dimension, it’s a good idea to mention your specific situation to your provider, since general comparisons can’t account for your individual health history or your baby’s specific needs. For decisions that are mostly about convenience, budget, or personal preference, your provider’s input may be less essential, but it’s never a bad idea to ask if you’re unsure.
This is a common situation, and working through a comparison like this one together — identifying which specific factors matter most to each of you — can help turn a general disagreement into a more concrete conversation. Sometimes the resolution is a hybrid approach, and sometimes it’s trying one option with an agreement to revisit the decision after a set period of time.