The claim

「Let them cry until they stop — the "cry-it-out immunity" method」

Q: Let them cry until they stop — the "cry-it-out immunity" method

Myth — This century-old behaviourist extreme is rejected by mainstream child development: after prolonged non-response, a baby who finally quiets has usually given up signalling, not learned self-soothing. Distinguish it from graduated methods for babies over 6 months with a set routine and timed parental check-ins — those are research-supported and don’t harm attachment.

Verdict

Myth

This century-old behaviourist extreme is rejected by mainstream child development: after prolonged non-response, a baby who finally quiets has usually given up signalling, not learned self-soothing. Distinguish it from graduated methods for babies over 6 months with a set routine and timed parental check-ins — those are research-supported and don’t harm attachment.

Sources

AAP · American Academy of Pediatrics
American Academy of Pediatrics. (2016). Behavioral interventions for infant sleep problems: A randomized controlled trial. Pediatrics, 137(6), e20151486. https://publications.aap.org/pediatrics/article/137/6/e20151486/52401/Behavioral-Interventions-for-Infant-Sleep-Problems
Direct source · Peer-reviewed paper · checked 2026-08-02

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「Let them cry until they stop — the "cry-it-out immunity" method」

Verdict

Sources

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Further reading