​They finally did a study that actually measured the results of behavioral approaches to baby sleep — but this time with objective measures. (Hall and al., 2015)

Not just asking the parents if the baby woke up or not.
They used actigraphy — the eye of a machine that watches sleep patterns.

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And what they discovered?

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Even when parents recorded that their baby didn’t wake them up after being sleep trained… the actigraphy still recorded biological wake-ups.

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In other words: sleep training doesn’t change the baby’s sleep pattern, but it changes how we perceive their sleep, often leading us to believe they are sleeping better when, biologically, they are not.

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So, this is what we’re gonna do this week: deep dive into how sleep biology works and what we can do to let biology do her work to support your baby’s sleep.

Making sure you have sleep biology by your side.