12 claims · three verdicts
Myth or method?
Guess before you read. Being asked first improves what you remember, even when the guess is wrong (which is a bit counterintuitive, and well replicated). Each answer links to the card and its sources.
-
Claim 1
Videos made for babies help them learn words.
Reveal the verdict
Not supported
In a study of 1,008 families, each daily hour of baby DVDs went with about 17 fewer words understood in 8–16-month-olds. Babies learn language from live, responsive people, and the maker of the best-known videos ended up offering refunds.
-
Claim 2
Starting skin-to-skin contact immediately improves survival for very small newborns.
Reveal the verdict
Well supported
A WHO trial in five countries randomised 3,211 babies under 1.8 kg. Immediate continuous skin-to-skin cut deaths in the first month from about 16 in 100 to about 12 in 100, and the trial was stopped early because the benefit was clear.
-
Claim 3
Sleep training with gradually longer waits damages a baby’s attachment to her parents.
Reveal the verdict
Not supported
Randomised trials measured exactly this, with stress-hormone samples and attachment assessments, and found no differences; a five-year follow-up of 326 children found no harm at age six. The debate is loud in public and quiet in the data.
-
Claim 4
Breastfeeding makes children substantially smarter.
Reveal the verdict
Partly true, oversold
The health benefits are clear. The one large randomised trial found about six IQ points at age six with a wide margin of error, and by sixteen the difference had mostly gone. Formula-fed babies are not developmentally behind.
-
Claim 5
Giving high-risk babies peanut between four and eleven months reduces peanut allergy.
Reveal the verdict
Well supported
The LEAP trial: 640 babies with severe eczema or egg allergy, and peanut allergy at five in 17% of avoiders versus 3% of eaters. It reversed decades of avoidance advice and changed the guidelines within two years.
-
Claim 6
Occasional spanking, used calmly, improves children’s behaviour.
Reveal the verdict
Not supported
A pooled analysis of 75 studies covering about 161,000 children found spanking associated with worse outcomes on 13 of 17 measures and better outcomes on none. Warm plus firm limits work, and pain does not add anything to them.
-
Claim 7
Screens damage babies’ brains directly.
Reveal the verdict
Partly true, oversold
More screen time does go with slower language across 42 studies, but the evidence is observational and the likeliest mechanism is displacement (screens replace conversation). Toddlers learn from a live video-chat partner who responds to them.
-
Claim 8
By age three, children from poorer families have heard 30 million fewer words.
Reveal the verdict
Partly true, oversold
The number came from 42 families, and a 2019 re-analysis found no consistent gap. What did hold up is that the number of back-and-forth exchanges predicts language and brain activation, independent of income. Turns matter; the famous number should probably be retired.
-
Claim 9
Amber teething necklaces relieve teething pain.
Reveal the verdict
Not supported
No evidence of pain relief, and documented strangulation and choking deaths. The FDA and the AAP both warn against them; a cold washcloth or a solid rubber teether is the recommendation.
-
Claim 10
Treating a parent’s postpartum depression improves outcomes for the baby.
Reveal the verdict
Well supported
Depression in either parent is linked to poorer bonding, language and behaviour outcomes, because it flattens exactly the responsiveness babies need. Screening and treatment work, which is why the AAP tells pediatricians to ask mothers how they are doing at the 1, 2, 4 and 6-month visits.
-
Claim 11
Playing classical music to babies raises their intelligence.
Reveal the verdict
Not supported
A meta-analysis of 39 studies found the “Mozart effect” tiny, not specific to Mozart, and inflated by publication bias, and two randomised trials of preschool music classes found no transfer to other skills. Singing to a baby, on the other hand, demonstrably soothes her.
-
Claim 12
If a baby is not stimulated enough in the first three years, the window has closed.
Reveal the verdict
Partly true, oversold
Timing matters a great deal for hearing, vision and the absence of severe neglect. For almost everything else the brain stays plastic well past three. The evidence supports the early years being important; it does not support a cliff, and the anxiety version tends to come with a product attached.