Babies protest, then withdraw, when a parent's face goes blank — and recover when it returns
A meta-analysis of the classic still-face experiment
Reviewed by Sian Trombley, CCCFounder, Thrive Family Company
Strong confidence
Source citation
Mesman J., van IJzendoorn M. H., Bakermans-Kranenburg M. J. (2009). The many faces of the Still-Face Paradigm: A review and meta-analysis. Developmental Review. https://doi.org/10.1016/j.dr.2009.02.001
Published 1 January 2009 · Added to Thrive 26 July 2026 · Reviewed 26 July 2026
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The still-face experiment is the clearest demonstration we have that regulation is something that happens between people before it happens inside one.
Published research findings
The study
Mesman and colleagues pooled decades of still-face studies in which a parent holds a neutral, unresponsive face for two minutes.
What researchers examined
How consistently infants show distress during the still-face, and how they respond during reunion.
What they found
Infants reliably reduced positive affect and gaze and increased distress during the still-face, then partially recovered — though not fully — once the parent re-engaged.
Thrive editorial interpretation
What this may mean for families
Attunement is not a luxury. Responsive faces regulate infant nervous systems, and repair after a rupture is a normal, expected part of the cycle.
What this doesn't tell us
Important limitations
Laboratory conditions are brief and artificial, and most samples were low-risk and Western.
Evidence confidence describes how much weight this study's design can carry — not how strongly the finding applies to any individual child or family.
Therapist perspective — Thrive interpretation, not a finding of the study
Therapist Perspective
No parent is attuned all the time. What matters, and what this paradigm shows, is that reconnection works.
Practical family considerations
Rupture is inevitable; repair is the skill.
This research summary is educational and does not replace individualized medical, psychological or therapeutic advice.
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Children regulate better when the back-and-forth with a parent is in rhythm — not when it is perfect
2017 · Meta-analysis
Strong confidence
Why it matters
Regulation appears to be practised relationally long before it is held individually. It is not the intensity of parenting that tracks with a child's control — it is the fit, timing and reciprocity of everyday exchanges.