Frequently asked questions

Room-sharing (baby's own sleep space in your room, not your bed) is an AAP safe-sleep recommendation for at least the first 6 months, ideally the first year, and can reduce SIDS risk by as much as half per the AAP's own guidance. It does not conflict with sleep training. Chair method and pick-up-put-down are naturally compatible since they involve you being present or entering/leaving the room anyway. Graduated and full extinction tend to work better if your baby cannot see you between checks (a crib divider or you waiting in another space), since being visible but unresponsive can intensify protest rather than settle it. See the full method comparison for the room-sharing fit noted per method.

This site is not affiliated with, and does not sell, any sleep training course, book, or paid consultation program. The method-fit quiz and the night-by-night plan builder are free, run entirely in your browser, require no signup or email, and give the same neutral treatment to all five methods, including naming which ones lack peer-reviewed timeline data rather than inventing a number to make every method look equally studied. See our methodology for how this site is reviewed and funded.

A randomized controlled trial that compared graduated extinction and bedtime fading against a no-treatment control measured attachment style at 12-month follow-up and found no significant difference between groups. A separate 5-year follow-up of a related cohort that received brief behavioral sleep consultations found no measurable long-term harm, and no measurable long-term benefit, to the parent-child relationship by age six. Neither finding is a guarantee about any individual family, and this is not medical advice; talk to your pediatrician about your specific situation. See the full citations on the method comparison page.

Timelines vary by method and are not guarantees for any individual baby. Full and graduated extinction have the shortest typically-reported windows (3 to 7 nights) in the peer-reviewed studies cited on this site. Chair method and pick-up-put-down lack RCT-level timeline data and rely on practitioner estimates (roughly 7 to 14 nights). Bedtime fading, directly studied in a randomized trial, tends to take the longest (2 to 3 weeks) because it works by shifting bedtime gradually rather than removing parental response. See the full comparison for sourced timeline ranges per method.

A randomized controlled trial measured saliva cortisol, a stress-hormone marker, in infants undergoing graduated extinction and found small-to-moderate declines rather than increases compared with a no-treatment control. A separate 5-year follow-up of children whose parents used behavioral sleep techniques (including extinction-based options) found no measurable long-term harm and no measurable long-term benefit to child emotional or behavioral outcomes by age six. These findings describe group averages in the cited studies, not a guarantee for any individual baby, and this is education, not medical advice. Full citations on the method comparison page.

There is no single official age cutoff, but nearly every randomized trial behind the methods on this site enrolled infants no younger than 4 to 6 months. This roughly matches when a baby's sleep architecture matures toward consolidated, adult-like sleep cycles. See is my baby ready to sleep train for the full age-gate explanation and safe-sleep basics.

Before assuming a method has failed, check three common causes. First, timing: a teething flare, illness, or developmental leap (see our regression guides) can stall any method and usually warrants pausing rather than pushing through. Second, consistency: switching your interval schedule, chair position, or response style night to night removes the predictability every method depends on. Third, realistic timeline: chair method, pick-up-put-down, and bedtime fading routinely take one to three weeks by design; a week of limited progress on those methods is not the same as a week of no progress on full extinction, which is typically resolved by then in the cited research. If none of those explain it, it may genuinely be the wrong method for your baby's temperament; the method-fit quiz can help you reconsider.